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Unit 6 The firm: Owners, managers, and employees

How the interactions among the firm’s owners, managers, and employees influence wages, work, and profits, and how this affects the entire economy

  • A firm is an economic organization, in which private owners of capital goods, hire and direct labour to produce goods and services for sale on markets, to make a profit. Such a firm is a stage on which interactions among the firm’s employees, managers, and owners play out.
  • Two other types of economic organization are also important: organizations that are operated by one person who is both an owner and the only worker, and those that employ only unpaid family workers in addition to the owner.
  • Hiring labour is different from buying other goods and services, and the contract between the employer and the employee is incomplete. It does not cover what the employer really cares about, which is how hard and well the employee works.
  • Firms do not pay the lowest wages possible. They set wages so that employees earn economic rents, to motivate them to work effectively, and stay with the firm.
  • Working together in firms brings mutual gains: profit for owners, and economic rents for managers and employees. There are conflicts of interest among these three parties about who gets the larger share of the mutual gains.
  • Firms make up the capitalist sector of the economy while other types of economic organization—primarily self-employment and families—make up what is termed the informal sector. Economies with both a capitalist and informal sector are called dual economies.
  • The growth of a dual economy takes the form of structural change, where surplus labour from the informal sector is drawn into to the capitalist sector as employees, were labour productivity is higher.

One of the authors of this book resides just outside the city of Bangalore, India. This is his description of the people he sees on his drive to work:

‘Since I live on the outskirts and next to a jowar (sorghum) field, the first person I see when I leave my gate at the break of dawn is a farmer walking his cows. Sometimes, at the corner, there is an “Istriwallah” (a self-employed person who irons people’s clothes) behind his cart who waves at me. A couple of domestic workers are on the road, walking to the homes in which they work. I make a turn and pass the nearest small provision store. Workers who work at the factory a little further down the road, which will open for the first shift in about twenty minutes, are drinking tea and having a biscuit at the bakery just next door.’

Work and workers come in many forms: Sakina from Unit 3, is a self-employed embroiderer. The farmers in Unit 5, and the one mentioned above, own their farms and cattle. The neighbourhood store and bakery are staffed by two families who rent the buildings, and the workers in the factory down the road are employed either on short-term contracts or as long-term employees by the firm owner. These are all examples in which production occurs.

own account work
Work undertaken for oneself, rather than for an employer.

Figure 6.1 presents the share of different occupational roles in the Indian economy. These classifications come from the national survey organization. The first category is that of the self-employed in household enterprises, like Sakina from Unit 3.

Self-employed workers, also referred to as ‘own account workers’, are those who operate their own farm or non-farm enterprise or engage in a trade or profession, either individually or in a partnership. Own account workers operate their enterprises without hiring any paid labour, while employers hire paid labour to work in their enterprise. The ‘Unpaid helpers’ shown in Figure 6.1 are a category of the self-employed (usually family members) who work without pay while assisting in the running of the household enterprise.

regular wage
A fixed and regular compensation for services provided, independent of time taken to provide those services.
casual labour
People who are employed on a temporary, rather than a permanent or regular basis.

The second broad category is that of the wage worker: those who work in firms in return for wages or salaries. They can also be sub-divided into regular wage workers and casual wage workers. Regular workers are employed in enterprises owned by others and are paid a wage or salary on a regular basis (like the factory workers). As is clear, they are a small proportion of the Indian economy.

Many well-known firms that you may have heard of, such as Wipro, Reliance, Honda, Apple, Walmart, and so on, hire these regular wage workers. But most firms that employ wage workers are much smaller than these famous examples. The owner of your neighbourhood grocery shop may employ a supervisor and a helper in addition to working in the shop himself. The plumber may be employed by a small local plumbing firm in your neighbourhood.

All of these different types of firms operate in the capitalist sector of the economy and sometimes compete with each other. Smaller firms, such as those with a single working owner or a few family and wage workers, tend to have less control over the prices they pay for their inputs or charge for their output. By contrast, large firms such as Wipro, Honda, or Apple can have a significant influence on market prices. We discuss these differences in Units 7 and 8.

dual economy
The existence of two sectors within an economy: one made up of capitalist firms and the other, the informal sector, made up of own account work, work in families and other productive activities not involving employers hiring workers.

The firms making up the capitalist sector of the economy—large or small—are far from the entire economy. In India, as Figure 6.1 shows, own account workers, and family labour in what is termed the informal economy, are as numerous as those working for wages. However, when it comes to the value of output produced and contribution to GDP, the story is quite different. Because the productivity of labour is much higher in the capitalist sector, workers there typically earn much more than their self-employed counterparts, and the capitalist sector produces much more output than the informal sector.

Types of workers and their share in the workforce: India

Figure 6.1 Types of workers and their share in the workforce: India

Periodic Labour Force Survey 2018–19

What is called a dual economy is one in which there are two sectors within an economy, one made up of capitalist firms and the other, the informal sector, made up of own account work, work in families, and other productive activities not involving employers hiring workers.

The superior productivity of labour in the capitalist sector occurs because in order to make profits, owners of firms seek to implement improvements in technology to increase the output produced by a given quantity of inputs so that it may better compete in the market. On the other hand, a family as an economic organization may be unwilling or unable to grow since its primary motivation to exist is to provide a living for the family members. Consider our story of the farm owner and the factory owner in Unit 3. The farm owner would likely agree to accommodate his unemployed nephew on the farm, even if doing so resulted in no additional output. By contrast, the factory owner would not do so.

capitalist firm
A business organization which pays wages and salaries to employ people, and purchases inputs to produce and market goods and services with the intention of making a profit.
subsistence level
The level of living standards (measured by consumption or income) such that the population will not grow or decline.

For all these reasons, it is important to make a sharp distinction between firms that employ wage workers and other forms of economic organization that do not. Structural change is thought of as a process by which single worker and family-based forms of economic organization give way to firms that employ wage workers in the capitalist sector of the economy. This process leads to rising labour productivity in the economy as a whole and ultimately rising standards of living.

The world of wage worker (capitalist) firms is vast and varied. But the central insights of this unit apply as much to a small motorcycle repair workshop employing three workers as they do to a large corporation like Apple.

To understand the firm, we will model how employers set wages and employees respond. We have already seen, in earlier units, the importance of work, and firms, in the economy:

  • Work is how people produce their livelihoods. In deciding how much time to spend working, people face a trade-off between free time and the goods that they can produce, or the goods they can buy with the wage income that they can earn by giving up some free time to work.
  • Production, wages, and living standards have grown through the innovation and adoption of new technologies by firms.
  • Production processes require labour to be combined with other inputs—like Angela’s labour and Bruno’s land—and how the income resulting from the interactions of workers and the owners of other inputs is divided up will depend on the bargaining power of each.
  • There are potential gains (to all concerned) from individuals specializing in tasks. Individuals who specialize become relatively better at producing the good on which they focus. So, if two individuals specialize in producing a different good, they may be able to produce more joint output than if they each tried to produce both goods.
  • The division of labour may be coordinated through market exchange. In Unit 5, the interaction between Angela and Bruno was coordinated initially by Bruno dictating terms and later by a contract trading the use of land for a share of the crop.
  • Another way that work may be coordinated and combined with other inputs is by organization within a firm. The firms in Unit 2 produced cloth, and their owners decided how much coal to buy, how many workers to employ, and what the workers should do to produce the cloth.

We illustrated each of these conclusions using models that illuminate some aspects of the economy, while setting aside others. In Unit 2, we did not consider how the length of the working day was determined while the economy was growing. In Unit 3, we did not model how the wage or the marginal rate of transformation of free time into goods was determined when we analysed a decision on working hours. In Unit 2, we told a story of conflicting interests over wages, but we did not model strategic interaction and bargaining until Units 4 and 5. And in Unit 5 we used the story of just two (imaginary) people—Bruno and Angela—to model how bargaining may affect the Pareto efficiency and fairness of allocations resulting from their interaction.

In this unit, we study how, in the capitalist sector of a modern economy, the coordination of labour takes place within firms, that is, by the direction of the owner and his appointed managers. We model how wages are determined and what this means for the sharing of the mutual gains that arise from combining labour and other inputs in a firm to produce outputs.

In Unit 7, we look at the firm as an actor in its relationship with other firms and with its customers.

6.1 Firms, markets, and the division of labour

The economy is made up of people doing different things, for example producing Apple display modules or making clothing for export. Producing display modules also involves many distinct tasks, done by different employees within Toshiba or Sharp, the companies that make them for Apple.

division of labour
The specialization of producers to carry out different tasks in the production process. Also known as: specialization.

Setting aside the unpaid work done in families such as we saw Sakina do in Unit 3, that is; cooking, cleaning or taking care of children, the sick, and the elderly, in a capitalist economy, the division of labour is coordinated in two major ways: firms and markets.1 2

  • Through firms, the components of goods are produced by different people in different departments of the firm, and assembled to produce the finished shirt or iPhone.
  • Or components produced by groups of workers in different firms may be brought together through market interactions between firms.
  • By buying and selling goods on markets, the finished iPhone gets from the producer into the pocket of the consumer, and the American Apparel shirt ends up on somebody’s back.

So in this unit we study firms. In the units to follow, we study markets. Herbert Simon, an economist, used the view from Mars to explain why it is important to study both.

Great economists Herbert Simon

Herbert Simon Imagine a visitor approaching Earth from Mars, Herbert ‘Herb’ Simon (1916–2001) urged his readers. Looking at Earth through a telescope that revealed social structure, what would our visitor see? Companies might appear as green fields, he suggested, divisions and departments as faint contours within. Connecting these fields, red lines of buying and selling. Within these fields, blue lines of authority, connecting boss and employee, foreman and assembly-worker, mentor and mentee.

Traditionally, economists had focused on the market and the competitive setting of prices. But to a visitor from Mars, Simon suggested:

Organizations would be the dominant feature of the landscape. A message sent back home, describing the scene, would speak of ‘large green areas interconnected by red lines.’ It would not likely speak of ‘a network of red lines connecting green spots’. (‘Organizations and Markets’, 1991)3

Trained as a political scientist, Simon’s desire to understand society led him to study both institutions and the human mind—to open the ‘black box’ of motivations that economists had come to take for granted. He was celebrated in departments of computer science, psychology, and, of course, economics, for which he won the Nobel Prize in 1978.

A firm, he pointed out, is not simply an agent, shifting to match supply and demand. It is composed of individuals, whose needs and desires might conflict. In what ways could these differences be resolved? Simon asked, when would an individual shift from contract work (a ‘sale’ of a particular, predefined task) to an employment relation (where a boss dictates the task after the sale—the relationship at the heart of a firm)?

When the desired task is easy to specify in a contract, Simon explained that we could view this as simply work-for-hire. But high uncertainty (the employer not knowing in advance what needs to be done) would make it impossible to specify in a contract what the worker was to do and, in this case, the result would be an employer-employee relation that is characteristic of the firm.4

This insight by Simon can help us understand why payments by the piece are still common in some occupations while others only pay per unit of time (such as daily, weekly, or monthly wages). A weaving firm that employs several weavers would find it convenient to pay its workers per metre of cloth produced since the output is easily specified in a contract and is observable. On the other hand, a grocery store would likely not find it convenient to pay its workers in this manner, since the duties would be varied and difficult to easily quantify or measure.

In conceptual terms there is a trade-off between having the flexibility of time use that a time-rated employee allows and the inflexibility that comes with having to pay a fixed wage regardless of work done. Similarly there is a trade-off between the inflexibility of piece contract and the flexibility it allows in paying strictly for work done and not for down time during which the employee may not be working.

This early work showcased two of Simon’s lasting interests: the complexity of economic relations, where one might sell an obligation that was incompletely described, and the role of uncertainty in changing the nature of decision making. His argument demonstrated the emergence of the ‘boss’.

Understanding how contract work turns into employment only implies that we understand a particular relationship between two members of an organization. We have yet to explain the firm as a whole—the Martian’s green fields.

What makes a good organization? This is a question for psychologists as much as economists, because we know that incentives that tie individual rewards to the success of the organization appear to have little effect.

Simon’s intellectual career can be contrasted with another great economist, Friedrich Hayek, whose ideas we will examine in detail in Unit 11. Both were interested in how societies could thrive in the face of uncertainty and imperfect agents. For Hayek, the price mechanism was all: a device to collect and process vast quantities of information, and so synchronize systems of arbitrary size.

But for Simon, the price mechanism needed to be supplemented—even supplanted—by institutions and governments better equipped to handle uncertainty and rapid change. These alternative ‘authority mechanisms’ draw on partially understood aspects of the human psyche: loyalty, group identification, and creative satisfaction.

By the time of his death in 2001, Simon had seen many of his ideas reach the mainstream. Behavioural economics has roots in his attempts to build economic theories that reflect empirical data. Simon’s view from Mars shows that economics could not be a self-contained science: an economist needs to be both a mathematician, working with decision-sets and utilities, and a social psychologist, reasoning about the motivations of human relationships.

The coordination of work

The way that labour is coordinated within firms is different to coordination through markets:

  • Firms represent a concentration of economic power: This is placed in the hands of the owners and managers, who regularly issue directives with the expectation that their employees will carry them out. An ‘order’ in the firm is a command.
  • Markets are characterized by a decentralization of power: Purchases and sales result from the buyers’ and sellers’ autonomous decision. An ‘order’ in a market is a request for a purchase that can be rejected if the seller pleases.

The prices that motivate and constrain people’s actions in a market are the result of the actions of thousands or millions of individuals, not a decision by someone in authority. The idea of private property specifically limits the things a government or anyone else can do with your possessions.

In a firm, by contrast, owners or their managers direct the activities of their employees, who may number in the thousands or even millions. The managers of Walmart, the world’s largest retailer, decide on the activities of 2.2 million employees, a larger number of people than any army in world history before the nineteenth century. Walmart is an exceptionally large firm, but it is not exceptional in that it brings together a large number of people who work together in a way coordinated (by the management) to make profits.

Unlike flash mobs, firms do not form spontaneously and then disappear. Like any organization, firms have a decision-making process and ways of imposing their decisions on the people in it. When we say that ‘the firm sets a price of $10.75’, we mean that the decision-making process in the firm resulted in these actions.5

Figure 6.2 shows a simplified picture of the firm’s actors and decision-making structure.

Figure 6.2 The firm’s actors and its decision making and information structures.

Owners decide long-term strategies

The owners, through their board of directors, decide the long-term strategies of the firm concerning how, what, and where to produce. They then direct the manager(s) to implement these decisions.

Managers assign workers

Each manager assigns workers to the tasks required for these decisions to be implemented, and attempts to ensure that the assignments are carried out.

Flows of information

The green arrows represent flows of information. The upward green arrows are dashed lines because workers often know things that managers do not, and managers know things that owners do not.

asymmetric information
Information that is relevant to the parties in an economic interaction, but is known by some but not by others. See also: adverse selection, moral hazard.

The dashed upward green arrows represent a problem of asymmetric information between levels in the firm’s hierarchy (owners and managers, managers and workers). Since owners or managers do not always know what their subordinates know or do, not all of their directions or commands (grey downward arrows) are necessarily carried out.

This relationship between the firm and its employees contrasts with the firm’s relationship to its customers, which we study in the next unit. The bakery firm cannot text its customers to tell them to ‘Show up at 8 a.m. and purchase two loaves of bread at the price of Rs. 20 each’. It could tempt its customers with a special offer, but unlike the employer with its employees, it cannot require them to show up. When you buy or sell something, it is generally voluntary. In buying or selling you respond to prices, not orders.

The firm is different: it is defined by having a decision-making structure in which some people have power over others. Ronald Coase, the economist who founded the study of the firm as both a stage and an actor, wrote:

If a workman moves from department Y to department X, he does not go because of a change in relative prices but because he is ordered to do so … the distinguishing mark of the firm is the suppression of the price mechanism. (‘The Nature of the Firm’, 1937)6

Coase pointed out that the firm in a capitalist economy is a miniature, privately owned, centrally planned economy. Its top–down decision-making structure resembles the centralized direction of production in entire economies that took place in many Communist countries (and in the US and the UK during the Second World War).7

Contracts and relationships

contract
A legal document or understanding that specifies a set of actions that parties to the contract must undertake.

The difference between market interactions and relationships within firms is clear when we consider the differing kinds of contracts that form the basis of exchange.

A sale contract for a car transfers ownership, meaning that the new owner can now use the car and exclude others from its use. A rental contract on an apartment does not transfer ownership of the apartment (which would include the right to sell it); instead it gives the tenant a limited set of rights over the apartment, including the right to exclude others (including the landlord) from its use.

wage labour
A system in which producers are paid for the time they work for their employers.

Under a wage labour contract, an employee gives the employer the right to direct him or her to be at work at specific times, and to accept the authority of the employer over the use of his or her time while at work.

The employer does not own the employee as a result of this contract. If the employer did, the employee would be called a slave. We might say that the employer has ‘rented’ the employee for part of the day. To summarize:

  • Contracts for products sold in markets permanently transfer ownership of the good from the seller to the buyer.
  • Contracts for labour temporarily transfer authority over a person’s activities from the employee to the manager or owner.

Firms differ from markets in another way: social interactions within firms sometimes extend over decades, or even a lifetime. In markets, we shop around, so our interactions are typically short-lived and not repeated. One of the reasons for this difference is that working in a firm—as either a manager or an employee—means acquiring a network of associates who are essential for the job to be done well. Some of our workmates will become our friends. Managers and employees also acquire both technical and social skills that are specific to the firm they work for.

firm-specific asset
Something that a person owns or can do that has more value in the individual’s current firm than in their next best alternative.

Oliver Williamson, an economist, termed these skills, networks, and friendships relationship-specific or firm-specific assets because they are valuable only while the worker remains employed in a particular firm. When the relationship ends, their value is lost to both sides. Think about how different this is to the social interactions in the market. Although you may know the face or even the name of a person from whom you buy, or to whom you sell something, the relationship is typically temporary, in which case this knowledge has little value.

This social aspect becomes important economically when economic changes disrupt social interactions.

Imagine how your life as a shopper changes if your local grocery store closes tomorrow. You would have to find a new place to shop, and it might take you a few minutes to learn where the various items you need are on display.

Now imagine what would change if the company in which you work goes out of business tomorrow. You would lose your network of work associates, your workplace friendships, and your firm-specific social and technical skills would suddenly have become useless to you. You might have to move to a new town. Your children would need to change school, so they would lose contact with their friends too.

Thus, the people making up the firm—owners, managers, and employees—are united in their common interest in the firm’s success, because all of them would suffer if it were to fail. However, they have conflicting interests about how to distribute the profits from the firm’s success amongst themselves (wages, managerial salaries, and owners’ profits), and may disagree about other policies such as conditions of work, managerial perks, and who makes the key decisions—such as whether Apple should assemble iPhones in China or the US.

Exercise 6.1 The structure of an organization

In Figure 6.2 we showed the actors and decision-making structure of a typical firm.

  1. How might the actors and decision-making structure of three organizations, Google, Wikipedia, and a family farm compare with this?
  2. Draw an organizational structure chart in the style of Figure 6.2 to represent each of these entities.

Question 6.1 Choose the correct answer(s)

Which of the following statements is true?

  • A labour contract transfers ownership of the employee from the employee to the employer.
  • The office where the employee works is a relation-specific asset, because the employee cannot use it after leaving the firm.
  • In a labour contract, one side of the contract has the power to issue orders to the other side, but this power is absent from a sale contract.
  • A firm is a structure that involves decentralization of power to the employees.
  • That would be slavery. A labour contract grants the firm the authority to direct the activities of the employee during specific times.
  • The office is not a relation-specific asset, because after the relationship ends another employee can use it, so it still has value to the firm.
  • A labour contract gives the employer the authority to direct the activities of the employee, whereas a sale contract transfers property rights and does not bind the parties to further actions.
  • Firms represent a concentration of economic power in the hands of the owners and managers.

6.2 Other people’s money: The separation of ownership and control

The firm’s profits legally belong to the people who own the firm’s assets, which include its capital goods. The owners direct the other members of the firm to take actions that contribute to the firm’s profits. This in turn will increase the value of the firm’s assets, and improve the wealth of the owners.

residual claimant
The person who receives the income left over from a firm or other project after the payment of all contractual costs (for example the cost of hiring workers and paying taxes).

The owners take whatever remains after revenues (the proceeds from sale of the products) are used to pay employees, managers, suppliers, creditors, and taxes. Profit is the residual. It is what’s left of the revenues after these payments. The owners claim it, which is why they are called residual claimants. Managers (unless they are also owners) are not residual claimants. Neither are employees.

This division of revenue has an important implication. If the firm’s revenues increase because managers or employees do their job well, the owners will benefit, but the managers and employees will not (unless they receive a promotion, bonus, or salary increase). This is one reason we consider the firm as a stage, one on which not all the actors have the same interests.

In small enterprises, the owners are typically also the managers and so are in charge of operational and strategic decisions. As an example, consider a restaurant owned by a sole proprietor, who decides on the menu, hours of operation, marketing strategies, choice of suppliers, and the size and compensation of the workforce. In most cases the owner will try to maximize the profits of the enterprise by providing the kinds of food and ambience that people want, at competitive prices. Such small enterprises are very common in the developing world.

share
A part of the assets of a firm that may be traded. It gives the holder a right to receive a proportion of a firm’s profit and to benefit when the firm’s assets become more valuable. Also known as: common stock.

In large corporations, there are typically many owners. Most of them play no part in the firm’s management. The owners of the firm are the individuals and institutions, such as pension funds, that own the shares issued by the firm. By issuing shares to the general public, a company can raise capital to finance its growth, leaving strategic and operational decisions to a relatively small group of specialized managers.

These decisions include what, where, and how to manufacture the firm’s products, or how much to pay employees and managers. The senior management of a firm is also responsible for deciding how much of the firm’s profits are distributed to shareholders in the form of dividends, and how much is retained to finance growth. Of course, the owners benefit from the firm’s growth because they own part of the value of the firm, which increases as the firm grows.

separation of ownership and control
The attribute of some firms by which managers are a separate group from the owners.

When managers decide on the use of other people’s funds, this is referred to as the separation of ownership and control.

The separation of ownership and control results in a potential conflict of interest.

The decisions of managers affect profits, and profits decide the incomes of the owners. But it is not always in the interest of managers to maximize profits. They may choose to take actions that benefit themselves, at the expense of the owners. Perhaps they will spend as much as possible on their company credit card, or seek to increase their own power and prestige through empire-building, even if that is not in the interests of shareholders.

Even small firms with just one owner are not required to maximize their profits. Restaurant owners can choose menus they personally like, or waiters who are their friends. But unlike managers, when they lose profits as a result, the cost comes directly out of their pocket.

In the eighteenth century, Adam Smith observed the tendency of senior managers to serve their own interests, rather than those of shareholders. He said this about the managers of what were then called joint-stock companies:

[B]eing the managers rather of other people’s money than of their own, it cannot well be expected, that they should watch over it with the same anxious vigilance with which the partners in a [firm managed by its owners] frequently watch over their own … Negligence and profusion, therefore, must always prevail, more or less, in the management of the affairs of such a company. (The Wealth of Nations, 1776)

Smith had not seen the modern firm, but he understood the problems raised by the separation of ownership and control. Now you can understand the motivation behind many South Asian firms that prefer to remain family-controlled and managed even as they get bigger. Owners of these firms are reluctant to relinquish control to managers who may or may not make decisions in the owners’ interest. There are two ways that owners can incentivize managers to serve their interests. They can structure contracts so that managerial compensation depends on the performance of the company’s share price. Also, the firm’s board of directors, which represents the firm’s shareholders and typically has a substantial share in the firm (like a representative of a pension fund), can monitor the managers’ performance. The board has the authority to dismiss managers, and shareholders in turn have the right to replace members of the board. The owners of large companies with many shareholders rarely exercise this authority, partly because shareholders are a large and diverse group that cannot easily get together to decide something. Occasionally, however, this free-rider problem is overcome and a shareholder with a large stake in a company may lead a shareholder revolt to change or influence senior management.

free ride
Benefiting from the contributions of others to some cooperative project without contributing oneself.

When we model the firm as an actor, we often assume that it maximizes profits. This is a simplification, but a reasonable one for most purposes:

  • Owners have a strong interest in profit maximization: It is the basis of their wealth.
  • Market competition penalizes or eliminates firms that do not make substantial profits for their owners: We saw this process in Unit 1 and Unit 2 as part of the explanation of the permanent technological revolution, and it applies to all aspects of the firms’ decisions.

Question 6.2 Choose the correct answer(s)

Which of the following statements about the separation of ownership and control is true?

  • When the ownership and control of a firm is separated, the managers become the residual claimants.
  • Managers always work to maximize the firm’s profit.
  • One way to address the problem associated with the separation of ownership and control is to pay the managers a salary that depends on the performance of the firm’s share price.
  • It is effective for shareholders to monitor the performance of the management, in a firm owned by a large number of shareholders.
  • The shareholders are the residual claimants.
  • Managers may choose to take actions that provide benefits for themselves at the expense of the owners.
  • Such performance-related pay is a common method of incentivizing managers to maximize the value of their firm.
  • When there are many shareholders, there is not only a coordination problem but also a free-rider problem, where every shareholder relies on others to do the costly monitoring (and hence no monitoring is undertaken as a result).

6.3 Other people’s labour

Capitalist firms, unlike the other two types of enterprises we have discussed, operate with wage workers or paid employees.

Thus, the capitalist firm does not only manage, as Adam Smith put it, ‘other people’s money’. The decision-makers in a firm decide on the use of other people’s labour too: the effort of their employees. People participate in firms because they can do better if they are part of the firm than if they are not. As in all voluntary economic interactions, there are mutual gains. But just as conflicts arise between owners and managers, there will generally be differences between owners and managers on the one hand, and employees on the other, about how the firm will use the strength, creativity, and other skills of its employees.

A firm’s profits (before the payment of taxes) depend on three things:

  • costs of acquiring the inputs necessary for the production process
  • output (how much these inputs produce)
  • sales revenues received from selling goods or services

Our focus here is how firms seek to minimize the cost of acquiring the necessary labour to produce the goods and services they sell. We have already seen in Unit 2 how firms might increase output without raising costs by adopting new technologies, and in Unit 7 we will study their sales decisions.

Hiring employees is different from buying other goods and services. When we buy a shirt or pay someone to mow a lawn, it is clear what we get for our cash. If we don’t get it, we don’t pay, but if we have already paid, we can go to court and get our money back.

But a firm cannot write an enforceable employment contract that specifies the exact tasks employees have to perform in order to get paid. This is for three reasons:

  • When the firm writes a contract for the employment of a worker, it cannot know exactly what it will need the employee to do, because this will be determined by unforeseen future events.
  • It would be impractical or too costly for the firm to observe exactly how much effort each employee makes in doing the job.
  • Even if the firm somehow acquired this information, it could not be the basis of an enforceable contract.

To understand the last point, consider a restaurant owner, who would like her staff to serve customers in a pleasant manner. Imagine how difficult it would be for a court to decide whether the owner can withhold wages from a waiter because he had not smiled often enough.

incomplete contract
A contract that does not specify, in an enforceable way, every aspect of the exchange that affects the interests of parties to the exchange (or of others).

An employment contract omits things that both the employees and the business owner care about: how hard and well the employee will work, and for how long the worker will stay. As a result of this contractual incompleteness, paying the lowest possible wage is almost never the firm’s strategy to minimize the cost of acquiring the labour effort it needs.

Exercise 6.2 Incomplete contracts

Think of two or three jobs with which you are familiar, perhaps a teacher, a retail worker, a nurse, or a police officer.

In each case, indicate why the employment contract is necessarily incomplete. What important parts of the person’s job—things that the employer would like to see the employee do or not do—cannot be covered in a contract, or if they are, cannot be enforced?

Great economists Karl Marx

Photograph of Karl Marx by John Mayall, public domain, via Wikimedia Commons Adam Smith, writing at the birth of capitalism in the eighteenth century, was to become its most famous advocate. Karl Marx (1818–1883), who watched capitalism mature in the industrial towns of England, was to become its most famous critic.

Born in Prussia (now part of Germany), he attended the local classical high school, which was celebrated for its ethos of enlightened liberalism. In 1842 he became a writer and editor for the Rheinische Zeitung, a liberal newspaper, which was then closed by the government, after which he moved to Paris and met Friedrich Engels, with whom he collaborated in writing The Communist Manifesto (1848). Marx then moved to London in 1849. At first, Marx and his wife Jenny lived in poverty. He earned money by writing about political events in Europe for the New York Tribune.

Marx saw capitalism as just the latest in a succession of economic arrangements in which people have lived since prehistory. Inequality was not unique to capitalism, he observed—slavery, feudalism, and most other economic systems had shared this feature—but capitalism also generated perpetual change and growth in output.8

He was the first economist to understand why the capitalist economy was the most dynamic in human history. Perpetual change arose, Marx observed, because capitalists could survive only by introducing new technologies and products, finding ways of lowering costs, and by reinvesting their profits into businesses that would perpetually grow.

This, he claimed, inevitably caused conflict between employers and workers. Buying and selling goods in an open market is a transaction between equals: nobody is in a position to order anyone else to buy or sell. In the labour market, in which owners of capital are buyers and workers are the sellers, the appearance of freedom and equality was, to Marx, an illusion.

Employers did not buy the employee’s work, because this cannot be purchased, as we have seen in this unit. Instead, the wage allowed the employer to rent the worker and to command workers inside the firm. Workers were not inclined to disobey because they might lose their jobs and join the ‘reserve army’ of the unemployed (the phrase that Marx used in his 1867 work, Capital). Marx thought that the power wielded by employers over workers was a core defect of capitalism.9

Capital is long and covers many subjects, but you can use a searchable archive to find the passages you need.

Marx also had influential views on history, politics, and sociology. He thought that history was decisively shaped by the interactions between scarcity, technological progress, and economic institutions, and that political conflicts arose from conflicts about the distribution of income and the organization of these institutions. He thought that capitalism, by organizing production and allocation in anonymous markets, created atomized individuals instead of integrated communities.

In recent years, economists have returned to themes in Marx’s work to help explain economic crises. These themes include the firm as an arena of conflict and of the exercise of power (this unit), the role of technological progress (Unit 1 and Unit 2), and the problems created by inequality (Unit 19 of The Economy).

piece-rate work
A type of employment in which the worker is paid a fixed amount for each unit of the product made.

Sometimes, though, it may be possible for firms just to pay employees according to how productive they are. For example, workers at a clothing factory might be paid per shirt or trousers that they finish stitching. This method of payment, known as piece rate, provides the employee with an incentive to exert effort, because employees take home more pay if they make more garments.

Piece rates were very common in the nineteenth century in the newly industrializing countries of that time, such as the US, where the pay of more than half of manufacturing workers was based on their output. But this declined over time and today less than 5% of manufacturing workers in the US are paid piece rates and, beyond the manufacturing sector, piece rates are used even less often.10

In India, Pakistan, and many other developing countries piece rates are still very common. For example, in the pickle-making industry in Varanasi, women get paid per kilogram of chillies that they cut and process. Similarly, in the famous Chikan embroidery industry in Lucknow, women are paid per garment embroidered. Piece rated payments are common in footwear, electronics, and many other industries.

A piece-rate system removes the need for supervision of the worker’s use of time. Why then, do all firms not use this simple method to reduce management costs and induce high effort from their employees? Why are daily, weekly, or monthly wages and salaries so common?

Time rates (payment for amount of time worked) are common when:

  • It is difficult to measure the amount of output an employee is producing in modern knowledge- and service-based economies (think about an office worker, or someone providing home care for an elderly person).
  • Employees usually work in teams rather than working alone, so measuring the contribution of individual workers is difficult (think about a team in a marketing company working on an advertising campaign, or the kitchen staff at a restaurant).

The experience of outsourcing in the modern manufacturing sector suggests that firms prefer to subcontract parts of the production process as piece-rate contracts where possible and reserve time rates where, for the reasons outlined above, piece rates are not practical.

If piece rates are not practical, then what other method could a firm use to induce high effort from workers? How could the firm provide an incentive to do the job well, even though the worker is paid for time and not output? Just as the owners of the firm protect their interests by linking management pay to the firm’s share price, the manager uses incentives so that employees will work effectively.

Question 6.3 Choose the correct answer(s)

Which of the following are reasons why employment contracts are incomplete?

  • The firm cannot contract an employee not to leave.
  • The firm cannot specify every eventuality in a contract.
  • The firm is unable to observe exactly how an employee is fulfilling the contract.
  • The contract is unfinished.
  • It may be costly for the firm if the employee leaves, but employees retain the right to do so.
  • Since the firm does not know all the tasks it will require of an employee, the contract is necessarily incomplete.
  • Since effort or the quality of an individual’s work cannot be perfectly monitored and measured, it cannot be specified in the contract.
  • Employment contracts are usually long-term. An incomplete contract is not one that is unfinished, but rather one that does not completely specify every relevant aspect of the relationship.

6.4 Employment rents

There are many reasons why people put in a good day’s work. For many people, doing a good job is its own reward, and doing anything else would contradict their work ethic. Even for those not intrinsically motivated to work hard, feelings of responsibility for other employees or for one’s employer may provide strong work motivation.

For some employees, hard work is a way to reciprocate a feeling of gratitude to the employer for providing a job with good working conditions. In other cases, firms identify teams of workers whose output is readily measured—for example, the percentage of on-time departures for airline staff—and pay a benefit to the whole group that is divided among team members.

But in the background, there is another reason to do a good job: the fear of being fired, or of missing the opportunity to be promoted into a position that has higher pay and greater job security.

Laws and practices concerning the termination of employment for cause (that is, because of inadequate or low quality work, not due to insufficient demand for the firm’s product) differ among countries. In some countries, the owners of the firm have the right to fire a worker whenever they choose, while in others, dismissal is difficult and costly. But even in these cases, an employee has to fear the consequences of not working up to the employer’s desired standards. Such a worker, for example, would be unlikely to achieve a position in the firm where she could count on remaining employed when lower demand for the firm’s products results in other workers being dismissed.

Do workers care whether they lose their jobs?

employment rent
The economic rent a worker receives when the net value of her job exceeds the net value of her next best alternative (that is, being unemployed). Also known as: cost of job loss.

If firms paid their employees the lowest wages they would be willing to accept, the answer would be no. Such a wage would make the worker indifferent between remaining in the job and losing it. But in practice most workers care very much. There is a difference between the value of the job (taking into account all the benefits and costs it entails) and the value of the next best option—which is being unemployed and having to search for a new job. In other words, there is an employment rent.

Employment rents can benefit owners and managers in two ways:

  • The employee is more likely to stay with the firm: If she were to quit the job, the firm would need to pay to recruit and train someone else.
  • They can threaten to fire the worker: Owners and managers exert power over employees because the employee has something to lose. The threat can be implicit or explicit, but it will make the worker perform in ways that she would not choose unless this was the case.

We can use the same reasoning in the employment of managers by the owners of the firm. The main reason owners wield power over managers is that they can fire them, and so eliminate their managerial employment rents.

How economists learn from facts Managers exert power

These examples show the effect of the power that managers and owners exert.

  • Labour economists Alan Krueger and Alexandre Mas unravel the mystery of why the tread on Bridgestone (Firestone) tyres was separating, endangering motorists and reducing profits.11
  • Barbara Ehrenreich worked undercover for minimum wage in motels and restaurants to see how America’s poor live.12
  • Polly Toynbee, a British journalist, had previously done the same in the UK in 2003, taking jobs such as call centre employee and care home worker.13
  • Harry Braverman provides a history of what he calls the ‘deskilling’ process, and suggests how dumbing down jobs is a strategy for maximizing the employer’s profits.14

When economists agree Coase and Marx on the firm and its employees

The writer George Bernard Shaw (1856–1950) joked that ‘if all economists were laid end to end, they would not reach a conclusion.’

This is funny, but not entirely true.

For example, the two leading economists of the early nineteenth century—Ricardo and Malthus—were political opponents. Ricardo often sided with businesspeople, for example in supporting freer imports of grain to Britain to reduce food prices and allow lower wages. Malthus opposed him and supported the Corn Laws that restricted grain imports, a position favoured by the landed gentry. But the two economists both proposed the same theory of land rents, which we still use today.

Even more striking is that two economists from different centuries and political orientations came up with similar ways of understanding the firm and its employees.

In the nineteenth century, Marx contrasted the way that buyers and sellers interact on a market, voluntarily engaging in trade, with how the firm is organized as a top–down structure, one in which employers issue orders and workers follow them. He called markets ‘a very Eden of the innate rights of man’, but described firms as ‘exploit[ing] labour-power to the greatest possible extent.’

When Ronald Coase died in 2013, he was described by Forbes magazine as ‘the greatest of the many great University of Chicago economists’. The motto of Forbes is ‘The capitalist tool’, and the University of Chicago has a reputation as the centre of conservative economic thinking.

Yet, like Marx, Coase stressed the central role of authority in the firm’s contractual relations:

Note the character of the contract into which an [employee] enters that is employed within a firm … for certain remuneration [the employee] agrees to obey the directions of the entrepreneur. (The nature of the firm, 1937)

Recall that Coase had also defined the firm by its political structure: ‘If a workman moves from department Y to department X, he does not go because of a change in prices but because he is ordered to do so.’ He sought to understand why firms exist at all, quoting his contemporary D. H. Robertson’s description of them as ‘islands of conscious power in this ocean of unconscious cooperation’.

Both based their thinking on careful empirical observation, and they arrived at a similar understanding of the hierarchy of the firm. They disagreed, however, on the consequences of what they observed: Coase thought that the hierarchy of the firm was a cost-reducing way to do business. Marx thought that the coercive authority of the boss over the worker limited the employee’s freedom. Like Malthus and Ricardo, Coase and Marx disagreed. But like Malthus and Ricardo, they also advanced economics with a common idea.

Counting the cost of job loss

Recall that an economic rent measures the value of a situation—for example, having your current job—compared to what you would get if the current situation were no longer possible.

To calculate employment rent—or in other words, the net cost of job loss—we need to weigh up all the benefits and costs of working compared with being unemployed and searching for another job.

There are some costs of working, such as:

  • The disutility of work: Employees must spend time doing things they would prefer not to do.
  • The cost of travelling to work every day.

But there are many benefits, which would be lost if you lost your job:

  • Wage income: This may be partially offset by an unemployment benefit or, in poorer countries, by the possibility of lower-paying self-employment or work on the family farm.
  • Firm-specific assets: These include workplace friends, and perhaps the proximity of the workplace to your present home.
  • Medical insurance: The employer may pay for the employee’s healthcare in some countries.
  • The social status of being employed: In Unit 13 we will see that the stigma of being unemployed is equivalent to a substantial financial cost for most people.

Even confining attention to the loss in wages, the cost is high. But how do we measure how high it is?

natural experiment
An empirical study exploiting naturally occurring statistical controls in which researchers do not have the ability to assign participants to treatment and control groups, as is the case in conventional experiments. Instead, differences in law, policy, weather, or other events can offer the opportunity to analyse populations as if they had been part of an experiment. The validity of such studies depends on the premise that the assignment of subjects to the naturally occurring treatment and control groups can be plausibly argued to be random.

How economists learn from facts How large are employment rents?

Setting aside the undoubtedly large but hard-to-measure psychological and social cost of losing one’s job, estimating the cost of job loss (the size of the employment rent) is not simple.

Can we compare the economic situation of workers currently employed with the economic situation of unemployed people? No, because the unemployed are a different group of people, with different abilities and skills. Even if they were employed, they would be likely (on average) to earn less than people who currently have jobs.

An entire firm closing, or a mass layoff of workers, provides a natural experiment that can help. We could look at the earnings of workers before and after they lost their job during a major employment cutback. When a factory closes because the parent company has decided to relocate production to some other part of the world, for example, virtually all workers lose their jobs, and not just the ones who were most likely to lose their jobs through poor performance.15 16

Louis Jacobson, Robert Lalonde, and Daniel Sullivan used such a natural experiment to estimate the cost of job loss. They studied experienced (not recently hired) full-time workers hit by mass layoffs in the US state of Pennsylvania in 1982. In 2014 dollars, those displaced had been averaging $50,000 in earnings in 1979. Those who were fortunate enough to find another job in less than three months took jobs that paid a lot less, averaging only $35,000: being laid off meant that their earnings declined by $15,000.17

Four years later they were still making $13,300 less than similar workers who had been making the same initial wage, but whose firms did not lay off their workers. In the five years that followed their layoff they lost the equivalent of an entire year’s earnings.

Many, of course, did not find work at all. They suffered even greater costs.

The year 1982 was not a good time to be looking for work in Pennsylvania, but similar estimates (from the US state of Connecticut between 1993 and 2004 for example) suggest that even in better times, employment rents are large enough that workers would worry about losing them.

Question 6.4 Choose the correct answer(s)

In which of the following employment situations would the employment rent be high, ceteris paribus?

  • In a job that provides many benefits, such as housing and medical insurance.
  • In an economic boom, when the ratio of job-seekers to vacancies is low.
  • When the worker is paid a high salary because she is a qualified accountant and there is a shortage of accountancy skills.
  • When the worker is paid a high salary because the firm’s customers know and trust her.
  • If the employee loses the job, all these benefits would be lost, so the economic rent from employment is high.
  • The cost of job loss is low, because it would be easy to find another job. Therefore, the economic rent is low.
  • A qualified accountant will be able to find other jobs easily at a similar salary, so the economic rent is low.
  • This worker is paid a high salary because of firm-specific assets that will be lost if she leaves. Other firms would pay a lower salary (at least initially) so the economic rent is high.

6.5 Determinants of the employment rent

To construct a model of how employment rents may be used to motivate employees to work hard, we consider Manisha, a worker earning Rs. 600 a day for a 6-day working week, or Rs. 14,400 a month. To determine her economic rent, we need to think how she would evaluate two aspects of her job:

  • The pay that she gets: which is something she values.
  • How hard she works: she would like to do no more work than is necessary.
utility
A numerical indicator of the value that one places on an outcome, such that higher valued outcomes will be chosen over lower valued ones when both are feasible.

Using the concept of utility introduced in Unit 3, we can say that Manisha’s utility is increased by the goods and services she can buy with her wage, but reduced by the unpleasantness of going to work and working hard all day—the disutility of work.

Her disutility of work depends on how much effort she puts into her job. Suppose she spends half of her working time actually working, and half doing other things like chatting with her co-workers. We represent this as an effort level of 0.5. Working this hard is equivalent to a cost of Rs. 100 per day to Manisha. To calculate her employment rent we first find her net utility of working and earning Rs. 600, compared with being unemployed and earning nothing:

This is her employment rent per day. The total employment rent (or cost of job loss), depends on how long she expects to remain unemployed. We will suppose that if she loses her job she can expect to remain unemployed for 44 weeks before finding another job. The analysis in Figure 6.3 shows how to calculate the rent.

Figure 6.3 Manisha’s employment rent for a given effort and Rs. 600 wage in an economy without an unemployment benefit.

Manisha’s wage

Manisha’s daily wage is Rs. 600. Looking ahead from now (taken as time 0), she will continue to receive this wage for the foreseeable future if she keeps her job, indicated by the horizontal line at the top of the figure.

The disutility of working

Mainsha’s current effort level is 0.5: she pursues non-work activities for half of the time on the job. Working this hard is equivalent to a cost of Rs. 100 per day to Manisha.

The net benefit of working

The difference between her wage and disutility of effort is the economic rent per day that she receives while employed.

If Manisha loses her job

If instead Manisha were to lose her job at time 0, she would no longer receive her wages. This unfortunate state would persist as long as she remains unemployed, indicated by the horizontal line at the bottom of the figure.

The duration of unemployment

The expected duration of unemployment is 44 weeks, where she would have worked 6 days per week. That is how long she will remain without pay (and without the disutility of working).

Manisha finds a job

Manisha expects to find another job at the same wage after 44 weeks.

Manisha’s employment rent

The shaded area is her total cost of job loss from the spell of unemployment, that is, her employment rent.

Her total employment rent is the employment rent per hour times the number of hours of work she will lose if her job is terminated. It is the shaded area in Figure 6.3.

unemployment benefit
A government transfer received by an unemployed person. Also known as: unemployment insurance

People who lose their jobs can typically expect help from family and friends while they are out of work. Also, in many economies, people who lose their jobs receive unemployment benefits or financial assistance from the government. However, unemployment benefits are usually not available in developing countries. As we noted in Unit 3, regular paid employment with benefits accounts for the minority of work that people actually do in such economies. Instead of unemployment benefits, people who lose formal jobs have to find work in alternative occupations to survive. This could be in, for example, self-employment or back at the family farm. Think about the Gowda family in Unit 2. If some of the members of the family had found work at a nearby firm, their fallback position would be to return to the farm and work there.

In general, family ties and similar networks are insurance against destitution, in the same way that unemployment benefits are in more developed countries, but work in such sectors may not be remunerative or even very productive. We explore the implication of having two sorts of sectors in the economy: a modern sector with formal jobs and a traditional sector with low productivity employment later in this unit. For now it is enough to know that what constitutes a minimum acceptable wage depends on the particular kind of country and society we are looking at. When we refer here to something like an unemployment benefit, in developing countries, you may want to think of this as being the same as the utility of employment in these fallback sectors.

reservation wage
What an employee would get in alternative employment, or from an unemployment benefit or other support, were he or she not employed in his or her current job.

If Manisha receives an unemployment benefit or income from any of these sources, it will partially offset the lost wage income. Let us suppose that while Manisha remains unemployed, she will receive a wage from a government benefit program equivalent to Rs. 300 a day for a 6-day week. This is her reservation wage—it is always available to her, so she would be indifferent between having a job that paid Rs. 300 an hour, and not working. In Figure 6.3, without unemployment benefits, her reservation wage was zero. Figure 6.4 shows how this affects Manisha’s employment rent, assuming her effort and disutility of work are unchanged.

Figure 6.4 Manisha’s employment rent for a given effort and wage, with unemployment benefit.

Our calculation of employment rent should take into account the reservation wage:

And taking account of the duration of unemployment we see that:

Unemployment benefits usually run out eventually: families and friends will not be able to help forever, and government unemployment benefits are often time-limited. If Manisha’s eligibility for the government program paying Rs. 300 lasted only for 15 weeks, her reservation wage would not be Rs. 300—she would not be indifferent between a job that paid Rs. 300 an hour and unemployment. The employment rent would be higher and her reservation wage would be lower, because the average level of benefits she could expect over the 44-week period of unemployment would be much less than Rs. 300.

Exercise 6.3 Using the model to measure the impact of government programs

In 2007 the Government of India launched a ‘Right to Work’ program called the National Rural Employment Guarantee Act (NREGA). It guaranteed work for up to 100 days to one person in every rural household for the going minimum wage rate.

If the NREGA wage rate was initially Rs. 300 per day but then increased to Rs. 350 per day, what would the impact be on Manisha’s reservation wage?

Exercise 6.4 Assumptions of the model

As in all economic models, our simplified representation of Manisha’s employment rent has deliberately omitted some aspects of the problem that might be important. For example, we have assumed that:

  • Manisha finds a job with the same pay after her spell of unemployment.
  • She does not experience any psychological or social costs from being unemployed.

Redraw Figure 6.3 to show how relaxing each of these assumptions would alter the employment rent. Specifically, assume:

  • Manisha can only find a job with the lower pay of Rs. 300 per day after her spell of unemployment.
  • She experiences a psychological cost of being unemployed of Rs. 50 per day. When unemployed, she gains Rs. 100 because there is no longer the disutility of working so the net gain is Rs. 50.

Our next step is to study the social interaction between the employer (who sets the wage knowing that it affects Manisha’s employment rent) and Manisha herself, whose decision on how hard to work is influenced by the rent.

Question 6.5 Choose the correct answer(s)

Manisha earns Rs. 600 per day in her current job and works 6 days a week. Her disutility of effort is equivalent to a cost of Rs. 100 per day of work. If she loses her job, she will receive unemployment benefit equivalent to Rs. 300 per day. Additionally, being unemployed has psychological and social costs equivalent to Rs. 50 per day. Then:

  • The employment rent per day is Rs. 150
  • Manisha’s reservation wage is Rs. 300 per day.
  • Manisha’s employment rent if she can get another job with the same wage rate after 44 weeks of being unemployed is Rs. 70,000.
  • Manisha’s employment rent if she can only get a job at a lower wage rate after 44 weeks of being unemployed is more than Rs. 66,000.
  • Employment rent per day = wage – unemployment benefit – disutility of effort + disutility of unemployment = 600 – 300 – 100 + 50 = Rs. 250. This is the net daily benefit of being employed compared with unemployment.
  • Manisha’s reservation wage = unemployment benefit – disutility of unemployment = Rs. 300 – Rs. 50 = Rs. 250. This is the wage at which Manisha is just willing to forgo her unemployment benefits for a job (but it is not enough to make her put in effort!).
  • Manisha’s employment rent = Rs. 250 (employment rent per day) × 6 days per week × 44 weeks = Rs. 66,000.
  • If she could get a job at the same wage after 44 weeks, Manisha’s employment rent = Rs. 250 (employment rent per day) × 6 days per week × 44 weeks = Rs. 66,000 If the new job would have a lower wage, her employment rent would be higher than Rs. 66,000.

6.6 Work and wages: The labour discipline model

When the cost of job loss (the employment rent) is large, workers will be willing to work harder in order to reduce the likelihood of losing the job. As we saw in the previous section, government programs such as unemployment insurance or employment guarantee can change a worker’s reservation wage and the cost of job loss.

A firm can also change the cost of job loss in various ways. For example, it can increase the cost of job loss, and therefore the effort exerted by its employees, by raising wages. We now represent this social interaction in the firm as a game played by the owners (through their managers) and the employees.

Remember that a game is a description of a social interaction, including:

  • a list of the players
  • the strategies they can adopt
  • the order in which the players choose their actions
  • what the players know when they choose their actions
  • the outcomes for each of the players (their payoffs) for all of the strategies that may be chosen

As with other models, we ignore some aspects of their interaction to focus on what is important, following the principle that sometimes we see more by looking at less.

On the stage of the firm, the cast of characters is just the owner (the employer) and a single worker, Manisha. The game is sequential (one of them chooses first, like the ultimatum game that we saw in Section 10 of Unit 4) and is repeated in each period of employment. Here is the order of play:

  1. The employer chooses a wage: This is based on his knowledge of how employees like Manisha respond to higher or lower wages, and informs her that she will be employed in subsequent periods at the same wage—as long as she works hard enough.
  2. Manisha chooses a level of work effort: This is in response to the wage offered, taking into account the costs of losing her job if she does not put in enough effort.

The payoff for the employer is the profit. The greater Manisha’s effort, the more goods or services she will produce, and the more profit he will make. Manisha’s payoff is her net valuation of the wage she receives, taking into account the effort she has expended.

Nash equilibrium
A set of strategies, one for each player in the game, such that each player’s strategy is a best response to the strategies chosen by everyone else.

If Manisha chooses her work effort as a best response to the employer’s offer, and the employer chooses the wage that maximizes his profit given that Manisha responds the way she does, their strategies are a Nash equilibrium.

Employers typically hire work supervisors and may install surveillance equipment to keep watch on their employees, increasing the likelihood that the management will find out if a worker is not working hard and well. Here we will ignore these extra costs and just assume that the employer occasionally gets some information on how hard or well an employee is working. This is not enough to implement a piece-rate contract, but more than enough to fire a worker if the news is not good. Manisha knows that the chance of the employer getting bad news decreases the harder she works.

To decide on the wage to set, the employer needs to know how the employee’s work effort will respond to higher wages. So we will consider Manisha’s decision first.

The employee’s best response

Manisha’s effort can vary between zero and one. We can think of this as the proportion of each hour that she spends working diligently (the rest of the time she is not working). An effort level of 0.5 indicates she is spending half the working day on non-work related activities such as checking her phone, chatting with co-workers, or just staring out of the window.

We will assume that Manisha’s reservation wage is Rs. 300. Even if she put in no work whatsoever (and so endured no disutility of effort, spending all day chatting with her co-workers) her job at a Rs. 300 wage would be no better than being without work. So she would not care one way or the other if her job ended, because work would always be available elsewhere at the reservation wage. Her best response to a wage of Rs. 300 would be zero effort.

What if she were paid a higher wage?

For Manisha, effort has a cost—the disutility of work—and a benefit: it increases the likelihood of her keeping the job, and the employment rent. In her choice of effort she needs to find a balance between these two.

A higher wage increases the employment rent and hence the benefit from effort, so it will lead her to choose a higher level of effort. Manisha’s best response (the effort she chooses) will increase with the level of the wage chosen by the employer.

worker’s best response function (to wage)
The optimal amount of work that a worker chooses to perform for each wage that the employer may offer.

Figure 6.5 shows the effort Manisha chooses for each level of the wage, referred to as her best response curve, or best response function. (Just like the production functions in Unit 3, it shows how one variable, in this case effort, depends on another, the wage.)

Figure 6.5 Manisha’s best response to the wage. Point J refers to the information in Figure 6.4. (wage = Rs. 600, effort = 0.5 and expected duration of unemployment if she were to lose her job = 44 weeks)

Effort per day

Effort per day, measured on the vertical axis, varies between zero and one.

The relationship between effort and the wage

If Manisha is paid Rs. 300 she does not care if she loses her job because Rs. 300 is her reservation wage. This is why she provides no effort at a Rs. 300 wage. If she is paid more, she provides more effort.

The worker’s best response

The upward-sloping curve shows how much effort she puts in for each value of the daily wage on the horizontal axis.

The effect of a wage increase when effort is low

When the wage is low, the best response curve is steep: a small wage increase raises effort by a substantial amount.

Diminishing marginal returns

At higher levels of wages, however, increases in wages have a smaller effect on effort.

The employer’s feasible set

The best response curve is the frontier of the employer’s feasible set of combinations of wages and effort that it gets from its employees.

The employer’s MRT

The slope of the best response curve is the employer’s marginal rate of transformation of higher wages into more worker effort.

Point J in Figure 6.5 represents the situation in Figure 6.4 discussed at the end of the previous section. Manisha’s reservation wage is Rs. 300, she is paid Rs. 600, and chooses effort of 0.5.

The best response curve is concave. It becomes flatter as the wage and the effort level increase. This is because, as the level of effort approaches the maximum possible level, the disutility of effort becomes greater. In this case it takes a larger employment rent (and hence a higher wage) to get effort from the employee.

Seen from the standpoint of the owner or the employer, the best response curve shows how paying higher wages can elicit higher effort, but with diminishing marginal returns. In other words, the higher the initial wage, the smaller the increase in effort and output the employer gets from an extra Rs. 50 per day in wages.

The best response curve is the frontier of the feasible set of combinations of wages and effort the firm can get from its employees, and the slope of the frontier is the marginal rate of transformation of wages into effort.

The lowest wage the firm could set for Manisha would be the reservation wage, Rs. 300, where the best response curve hits the horizontal axis and effort is zero. So we can see that the firm would never offer the lowest wage possible, because she would not work.

Leibniz: The worker’s best response function

What sorts of factors would change Manisha’s best response? For example, we have drawn the best response function in Figure 6.5 under the assumption that unemployment is expected to last 44 weeks. If the expected duration were to change, the best response function would change too. If economic conditions worsened, increasing unemployment duration, Manisha’s employment rent would be higher. So for any wage, her best response would be to exert a higher level of effort.

In a developing part of the world like South Asia, structural factors are relevant as well. As we have seen in Unit 1, economic growth is expected to create employment in the formal sector of the economy and reduce the size of the informal sector. If this does happen, it means that the number of formal jobs available increases while the number of informal workers looking for formal jobs falls. What is likely to be the impact of Manisha’s best response function? A smaller pool of surplus labour would entail shorter unemployment spells. It would be easier, if fired, to find another job. This would reduce the cost of job loss. Employment rent would be lower and for any wage, Manisha’s best response would be to exert a lower level of effort.

Question 6.6 Choose the correct answer(s)

Figure 6.5 depicted Manisha’s best response curve when the expected duration of unemployment was 44 weeks. Which of the following statements is correct?

  • If the expected unemployment duration increased to 50 weeks, Manisha’s best response to a wage of Rs. 600 would be an effort level above 0.5.
  • If the unemployment benefit was reduced, then Manisha’s reservation wage would be higher than Rs. 300.
  • Over the range of wages shown in the figure, Manisha would never exert the maximum possible effort per day.
  • Increasing effort from 0.5 to 0.6 requires a bigger wage increase than increasing effort from 0.8 to 0.9.
  • 0.5 is Manisha’s best response to a wage of Rs. 600 when expected unemployment duration is 44 weeks. If duration increases to 50 weeks, the cost of job loss is higher, so Manisha will work harder for the same wage.
  • If the unemployment benefit was reduced, then the reservation wage would fall below Rs 300.
  • The maximum level of effort would not be provided over the wage range shown.
  • When effort is lower, a smaller wage rise is required to increase it by 0.1.

6.7 Wages, effort, and profits in the labour discipline model

Manisha is not in the situation that Angela faced when Bruno could order her to work at the point of a gun. Manisha has bargaining power because she can always walk away—an option that, initially, Angela did not have.

Manisha chooses how hard she works. The best the owner can do is to determine the conditions under which she makes that choice. The owners and managers know that they cannot get Manisha to provide more effort than is given by the best response curve shown in Figure 6.5. The fact that the best response curve slopes upwards means that employers face a trade-off. They can get more effort only by paying higher wages.

As we saw in Unit 2, to maximize profits, firms want to minimize the costs of production. In particular, they want to pay the lowest possible price for inputs. A company purchasing oil for use in the production process will look for the supplier that can provide it at the lowest price per litre, or equivalently, supply the most oil per dollar. Likewise, Manisha provides an input to production, and her employer would like to purchase it at the lowest price. But this does not mean paying the lowest possible wage. We already know that if he paid the reservation wage, workers might show up (they wouldn’t care one way or the other), but they would not work if they did.

The wage, w, is the cost to the employer of a day of a worker’s time. But what matters for production is not how many days Manisha provides, but how many units of effort: effort is the input to the production process. If Manisha chooses to provide 0.5 units of effort per day, and her daily wage is w, the cost to the employer of a unit of effort is 2w. In general, if she provides e units of effort per day, the cost of a unit of effort is w/e.

So, to maximize profits, the employer should find a feasible combination of effort and wage that minimizes the cost per unit of effort, w/e.

Another way to say the same thing is that the employer should maximize the number of units of effort (sometimes called efficiency units) that he gets per rupee of wage cost, e/w.

The upward-sloping straight line in Figure 6.6 joins together a set of points that have the same ratio of effort to wages, e/w. If the wage is Rs. 500 per day and a worker provides 0.4 units of effort per day, the employer gets 0.0008 efficiency units per rupee. Equivalently, a unit of effort costs Rs. 500/0.4 = Rs. 1,250 . The employer would be indifferent between this situation and one in which the wage is Rs. 1,000 with an effort of 0.8—the cost of effort is exactly the same at all points on the line. We will call this an isocost line for effort. Similarly to the isocost lines in Unit 2, these lines join points that have identical effects on the employer’s costs. We can also think of it as an indifference curve for the employer.

Figure 6.6 The employer’s indifference curves: Isocost curves for effort.

An isocost line for effort

If w = Rs. 500 and e = 0.4, e/w = 0.0008. At every point on this line the ratio of effort to wages is the same. The cost of a unit of effort is w/e = Rs. 1,250.

The slope of the isocost line

The line slopes upward because a higher effort level must be accompanied by a higher wage for the e/w ratio to remain unchanged. The slope is equal to e/w = 0.0008, the number of units of effort per rupee.

Other isocost lines

On an isocost line, the slope is e/w, but the cost of effort is w/e. The steeper line has a lower cost of effort, and the flatter line has a higher cost of effort.

Some lines are better for the employer than others

A steeper line means lower cost of effort and hence higher profits for the employer. On the steepest isocost line he gets 0.7 units of effort for a wage of Rs. 500 (at B) so the cost of effort is Rs. 500/0.7 = Rs. 714.2 per unit. On the middle line he only gets 0.4 units of effort at this wage, so the cost of effort is Rs. 1,250, and profits are lower.

The slope is the MRS

The employer is indifferent between points on an isocost line. Like other indifference curves, the slope of the effort isocost line is the marginal rate of substitution: the rate at which the employer is willing to increase wages to get higher effort.

To minimize costs, the employer will seek to reach the steepest isocost line for effort, where the cost of a unit of effort is lowest. But because he cannot dictate the level of effort, he has to pick some point on Manisha’s best response curve.

The best he can do is to set the wage at Rs. 600 on the isocost line that is tangent to Manisha’s best response curve (point A). Use the analysis in Figure 6.7 to see how the employer sets the wage.

Figure 6.7 The employer sets the wage to minimize the cost of effort.

Minimizing the cost of effort

To maximize profits, the owner wants to obtain effort at the lowest cost. He will seek to get onto the steepest isocost line possible. But because he cannot dictate the level of effort, he has to pick some point on the worker’s best response curve.

C is not the best the employer can do

Could this be a point such as C? No. It is clear that by paying more the owner will benefit from a lower wage-effort ratio.

Point A is the best the employer can do

The best he can do is the isocost line that is just touching (tangent to) the worker’s best response curve.

MRS = MRT

At this point, the marginal rate of substitution (the slope of the isocost line for effort) is equal to the marginal rate of transformation of higher wages into greater effort (the slope of the best response function).

Point B

Points on steeper isocosts, such as Point B, would have lower costs for the employer but are infeasible.

Minimum feasible costs

Therefore Rs. 600 is the daily wage that the employer should set to minimize costs and maximize profits.

In Figure 6.7, the employer will choose point A, offering a wage of Rs. 600 per day to hire Manisha, who will exert effort of 0.5. The employer cannot do better than this point: any point with lower costs, for example, point B, is infeasible.

The employer minimizes costs and maximizes profit at the point where his MRS (the slope of his indifference curve or isocost line) equals the MRT (the slope of the best response curve, which is his feasible frontier). He balances the trade-off he is willing to make between wages and effort against the trade-off he is constrained to make by Manisha’s response.

Leibniz: Finding the profit-maximizing wage

This is a constrained choice problem, similar to the one in Unit 3. There, individuals maximizing utility chose working hours where MRS = MRT: the slope of their indifference curve equalled the slope of the feasible frontier determined by the production technology.

efficiency wages
The payment an employer makes that is higher than an employee’s reservation wage, so as to motivate the employee to provide more effort on the job than he or she would otherwise choose to make. See also: labour discipline model, employment rent.

When wages are set by the employer in this manner, they are sometimes called efficiency wages because the employer is recognizing that what matters for profits is e/w, the efficiency units per rupee of wage costs, rather than how much a day of work costs.

labour discipline model
A model that explains how employers set wages so that employees receive an economic rent (called employment rent), which provides workers an incentive to work hard in order to avoid job termination. See also: employment rent, efficiency wages.

What has the labour discipline model told us?

  • Equilibrium: In the owner-employee game, the employer offers a wage and Manisha provides a level of effort in response. Their strategies are a Nash equilibrium.
  • Rent: In this allocation Manisha provides effort because she receives an employment rent that she might lose if she were to slack off on the job.
  • Power: Because Manisha fears losing this economic rent, the employer is able to exercise power over her, getting her to act in ways that she would not do without this threat of job loss. This contributes to the profits of the employer.
unemployment, involuntary
The state of being out of work, but pre­ferring to have a job at the wages and working conditions that other­wise identical employed workers have. See also: unemployment.

Involuntary unemployment

When we think about the implications of the labour discipline model for the whole economy, it tells us something else, which may at first seem surprising:

There must always be involuntary unemployment.

Being unemployed involuntarily means not having a job, although you would be willing to work at the wage that other workers like you are receiving.

In developing our model we assumed that Manisha could expect to be unemployed for 44 weeks before receiving another wage offer at the same level. But the model implies that there must be an extended period of unemployment.

To see why, try to imagine an equilibrium in the game between Manisha and her employer in which he pays her a wage of Rs. 600 per day, and if she lost her job she could immediately find another at the same wage. In that case, Manisha’s employment rent would be zero. She would be indifferent between keeping the job and losing it. So her best response would be an effort level of zero. But this could not be an equilibrium: the employer would not pay Rs. 600 a day to someone who did no work.

If it were ever to happen that there were plenty of jobs available in the economy at Rs. 600 per day, and no one was unemployed, such a situation could not last. Employers would offer higher wages to ensure that their workers had something to lose and would therefore work hard. But with higher wages, they would not be able to offer as many jobs. Workers who lost their jobs would no longer be able to find new ones easily. Jobs would be scarce and it might take weeks or months to find another. The economy would have moved to an equilibrium with higher wages and involuntary unemployment. Employees would be earning Rs. 800 a day and those who lost their jobs would be willing to accept another at Rs. 800, but they would not immediately be able to find one.

In equilibrium, both wages and involuntary unemployment have to be high enough to ensure that there is enough employment rent for workers to put in effort.

Unemployment is an important concern for voters and the policymakers who represent them. We can use this model to see how policies that governments pursue to alter the level of unemployment, or to provide income to unemployed workers, will affect the profits of firms and the effort level of their employees.

Exercise 6.5 The employer sets the wage

Would any of the following affect Manisha’s best response curve or the firm’s isocost lines for effort in Figure 6.7? If so, explain how.

  1. The government decides to increase childcare subsidies for working parents but not for those unemployed. Assume Manisha has a child and is eligible for the subsidy.
  2. Demand for the firm’s output rises as celebrities endorse the good.
  3. Improved technology makes Manisha’s job easier.

Question 6.7 Choose the correct answer(s)

Figure 6.7 depicts the efficiency wage equilibrium of a worker and a firm. According to this figure:

  • Along the isocost line tangent to the best response curve, doubling of the per-day effort from 0.4 to 0.8 would lead to an increased profit for the firm.
  • The slope of each isocost line is the number of units of effort per rupee.
  • At the equilibrium point, the marginal rate of transformation on the isocost line equals the marginal rate of substitution on the worker’s best response curve.
  • Points C and A both represent Nash equilibria because they are on the best response curve.
  • Along the isocost line, doubling effort requires doubling the wage. The cost of effort would not change, so profit would not change either.
  • Isocost lines have a constant ratio of effort to wage, e/w. Since e is on the vertical axis, and w is on the horizontal axis, the slope is e/w, which is the number of units of effort per rupee.
  • At the equilibrium point, the marginal rate of substitution between higher wage cost and higher effort on the isocost line equals the marginal rate of transformation of higher wages into greater effort on the worker’s best response curve.
  • At point C the worker’s choice of effort is a best response if the employer chooses this wage. But the employer would not be doing the best he could, given the worker’s strategy for choosing effort, so it is not a Nash equilibrium.

6.8 Putting the model to work: Owners, employees, and the economy

Until now we have considered how the employer chooses a point on the best response function. But changes in economic conditions or public policies can shift the entire best response function, moving it to the right (or up) or to the left (or down).

The employee’s incentive to choose a high level of effort depends on how much she has to lose (the employment rent), but also the likelihood of losing it. So the position of the best response function depends on:

  • the utility of the things that can be bought with the wage
  • the disutility of effort
  • the reservation wage
  • the probability of getting fired when working at each effort level

If there are changes in any of these factors, the best response curve will shift.

First, imagine how an increase in the unemployment rate affects the best response curve. When unemployment is high, workers who lose their jobs can expect a longer spell of unemployment. Recall that unemployment benefits (including support from family and friends) are limited, so the longer the expected spell of unemployment, the lower the level of the unemployment benefit per hour of lost work (or per week). So an increase in the duration of a spell of unemployment has two effects:

  • It reduces the reservation wage: This increases the employment rent per hour.
  • It extends the period of lost work time: This increases total employment rents (the cost of job loss).

Figure 6.8 shows the effects on the best response curve of a rise in unemployment, and also of a rise in unemployment benefits.

Figure 6.8 The best response curve depends on the level of unemployment and the unemployment benefit.

The status quo

The position of the best response curve depends on the reservation wage. It crosses the horizontal axis at this point.

The effect of unemployment benefits

A rise in the unemployment benefit increases the reservation wage and shifts the worker’s best response curve to the right.

An increase in unemployment

If unemployment rises, the expected duration of unemployment increases. So the worker’s reservation wage falls and the best response curve shifts to the left.

Effort changes for each wage

For a given daily wage, say Rs. 900, workers put in different levels of effort when the levels of unemployment or unemployment benefit change.

A rise in the level of unemployment shifts the best response curve to the left:

  • For a given wage, say Rs. 900, the amount of effort that the worker will provide increases, improving the profit-making conditions for the employer.
  • The wage that the employer would have to pay to get a given effort level, say 0.6, decreases.

A rise in unemployment benefits shifts the best response curve to the right, so it has the opposite effects.

Economic policies can alter both the size of the unemployment benefit and the extent of unemployment (and hence the duration of a spell of unemployment). These policies are often controversial. A rightward shift of the employee’s best response function favours employees, who will put in less effort for any given wage, while a leftward shift favours owners, who will acquire the effort of their employees at a lower cost, raising profits.

Exercise 6.6 Effort and wages

Suppose that, with the status quo best response curve in Figure 6.8, the firm chooses the wage to minimize the cost of effort, and the worker’s best response is an effort level of 0.6. If unemployment rose:

  1. Would effort be higher or lower than 0.6 if the firm did not change the wage?
  2. How would the firm change the wage if it wanted to keep the effort level at 0.6?
  3. How would the wage change if the firm minimized the cost of effort at the new unemployment level?

How economists learn from facts Workers speed up when the economy slows down

The idea that employment rents are an incentive for employees to work harder is illustrated in a study by Edward Lazear (an economic advisor to former US President George W. Bush) and his co-authors. They investigated a single firm during the global financial crisis, to see how the managers and workers reacted to the turbulent economic conditions. The firm specializes in technology-based services such as insurance-claims processing, computer-based test grading, and technical call centres, and operates in 12 US states. The nature of the work made it easy for the management of the firm to track the productivity of workers, which is a measure of worker effort.

It also allowed Lazear and his colleagues to use the firm’s data from 2006–2010 to analyse the effect on worker productivity of the worst recession since the Great Depression.

When unemployment rose, workers could expect a longer spell of unemployment if they lost their job. Firms did not use their increased bargaining power to lower wages as they could have, fearing the reaction of their employees.

Lazear and his co-authors found that, in this firm, productivity increased dramatically as unemployment rose during the financial crisis. One possible explanation is that average productivity increased because management fired the least productive members of the workforce. But Lazear found that the effect was more due to workers putting in extra effort. The severity of the recession raised the workers’ employment rent for any given wage, and they were therefore willing to work harder. We would predict from our model that the best response curve would have shifted to the left as a result of the recession. This meant that (unless employers lowered wages substantially) workers would work harder. Apparently, this is what happened.18

Our model shows that employers could have cut wages, while sustaining an employment rent sufficient to motivate hard work. An earlier recession provided another insight that helps to explain their reluctance to reduce wages in the crisis. Truman Bewley, an economist, was puzzled when he saw only a handful of firms in the northeast of the US cutting wages during the recession of the early 1990s. Most firms, like the one Lazear’s team studied, did not cut their wages at all.

Bewley interviewed more than 300 employers, labour leaders, business consultants, and careers advisors in the northeast of the US. He found that employers chose not to cut wages because they thought it would hurt employee morale, reducing productivity and leading to problems of hiring and retention. They thought it would ultimately cost the employer more than the money they would save in wages.19

Exercise 6.7 Lazear’s results

Use the best response diagram to sketch the results found by Lazear and co-authors in their study of a firm during the global financial crisis.

  1. Draw a best response curve for each of the following years and explain what it illustrates:

    1. the pre-crisis period (2006)
    2. the crisis years (2007–8)
    3. the post-crisis year (2009)

    Assume that the employer did not adjust wages.

  2. Is there a reason why a firm might not cut wages during a recession? Think about the research of Truman Bewley and the experimental evidence about reciprocity in Unit 4.

Exercise 6.8 Outsourcing comes home

Many clothing companies based in rich (high-wage) countries outsource production to poorer, developing countries like Bangladesh. Show your results in a single diagram.

  1. Draw the best response curve of the workers in the high-wage country in the absence of outsourcing (with the wage on the horizontal axis, and effort on the vertical axis).
  2. In the same diagram show the best response curve of workers in the low-wage country in the absence of outsourcing. (Assume that wages are measured in dollars in both cases.)
  3. Show in your diagram what the rich country employer will pay its country workers if outsourcing is not possible.
  4. Show in your diagram what the rich country employer will pay workers in the low-wage country if it switches production there (ignore the costs of moving production).
  5. Now assume that outsourcing is possible and is widely practiced by many firms in the clothing industry. Show the best response function for the rich country workers under these conditions. Explain why this is different from your answer to 1. Show these outcomes in a diagram.

Question 6.8 Choose the correct answer(s)

Which of the following statements are true?

  • If unemployment benefits are increased, the minimum cost of a unit of effort for the employer will rise.
  • If the wage doesn’t change, employees will work harder in periods of high unemployment.
  • If workers continue to receive benefits however long they remained unemployed, an increase in the level of unemployment will have no effect on the best response curve.
  • If an employee’s disutility of effort increases, the reservation wage will rise.
  • An increase in unemployment benefits shifts the best response curve to the right. The employer will no longer be able to reach the isocost line tangent to the original best response curve, so the cost of effort must rise.
  • In periods of high unemployment, the cost of job loss is higher. At any given wage level, employees will choose higher effort to reduce the chance of losing their jobs.
  • In this case, an increase in the level of unemployment would not affect the reservation wage, but it would increase the cost of job loss so the best response curve will change.
  • At the reservation wage, the employee is indifferent between employment and unemployment, and would exert no effort. So a change in the disutility of effort would have no effect.

6.9 The dual economy

dual economy
The existence of two sectors within an economy: one made up of capitalist firms and the other, the informal sector, made up of own account work, work in families and other productive activities not involving employers hiring workers.

Recall from the introduction of this unit that the firms in the capitalist sector of an economy are not the only kind of economic organization. In a dual economy like India’s and many other low-income economies, there are a great many people working on their own account and others working as part of a family. To explore the informal sector we return to the story of Gowda from Unit 2, but this time, with a little twist.

As you may recall, Gowda and his wife Bina have eight children, now grown up as young adults. Each additional farmer working the plot of land that they farm adds progressively less to the total output. Recall here that this does not have to do with the effort or capacity of the farmer—in the model, each farmer is identical—but is due to the diminishing average product of land. Assume that when there are five farmers (Gowda, Bina and three children), given the land and the equipment they have, adding any more farmers to the field does not increase the total product. In other words, the marginal product is zero. These workers are called ‘surplus labour’. The table in Figure 6.9a depicts this situation. It shows how the value of what the farm produces, measured in rupees, depends on the number of farmers working the land.

Person Total Product Marginal Product Average Product or Income per person
1 50 50 50
2 90 40 45
3 120 30 40
4 140 20 35
5 150 10 30
6 150 0 25
7 150 0 21
8 150 0 19
9 150 0 17
10 150 0 15

Figure 6.9a Marginal Product, Total Product and Average Product.

Note that the last column is the average product, that is, the total amount produced per day divided by the number of farmers producing it. We also label this as average income per person because we assume that the total output is shared equally amongst all members of the family. Thus, the total output divided by total number of workers is the ‘income’ of a member of the family. Figure 6.9b shows the production function of the family.

The family’s production function on the farm.

Figure 6.9b The family’s production function on the farm.

The production function is similar to the one that you saw in Unit 2. Clearly all the farmers past the fifth one are not adding to total production.

Now, suppose that a number of textile factories have opened up a hundred miles away in the nearest city. One day, a recruiter comes to the village from one of the factories and offers to take anyone who is willing to work for 25 rupees a day (those going to the factory would live rent-free in a factory provided dormitory). Other families are visited by recruiters from other factories as well with similar proposals.

That evening, Gowda and Bina and their family sit together and talk. The family has been poor for some time now and after some soul searching, Gowda and Bina ask the eldest four children if they will take the job. They reason that although it breaks their hearts to split up the family, their leaving will ensure that the remaining six people on the farm will have more to eat, since they will produce the same amount of grain (worth 150 rupees), which now only has to be shared between the six that remain on the farm.

As a result, the average income of those remaining on the farm will now be 25, instead of 15 had they all remained. Those going to the factory would have the same income, 25. Each of them is happy to go, because were any one of them to decide instead to stay in the village there would be seven people working the farm (and seven mouths at the table). As a result, their average income would be 21, less than they would be making in the city.

The income of the family taken as a whole would rise from 150 when all were working the farm to 250 when the wages of the four working the factory are added in. The next day, the family remaining bids a teary farewell to four children who climb on the back of the recruiter’s truck and head to the city.

A month later the recruiter is back in the village. His factory is highly profitable and he has used the profits to expand the number of machines: he would like to employ more of the family, and again offers 25 rupees. The conversation among the family that evening is not like the previous one. Bina explains that the total family income will increase if one more of the children goes to work in the factory: any one of their number, for example, Anil, the sixth child, is not adding anything to the output of the farm, and would earn 25 rupees at the factory.

And if Anil left, the five remaining would now have an income of 30. ‘Then why should I go, objects Anil. You who remain in the village would then have a higher standard of living than me. Let Lakshmi, my younger sister go.’ Lakshmi understands Anil’s point and does not want to go either.

Gowda and Bina are not pleased; but they really cannot force Anil or Lakshmi to go. Gowda refuses the recruiter’s offer. ‘Ok, the recruiter replies. How about 35 rupees?’ Anil would have an income of 30 if he stayed in the village, so 35 gives him not only a reason to go to the city, but also to work hard at the factory, so as not to lose his job and have to return home.

Anil nods that he is happy to go under those terms and he joins the others from the village in the recruiter’s truck returning to the factory.

Again, the income of the family has increased because they still produce 150 rupees of grain, and Anil has added his wage to the family’s total income. The others working in the factory have also gained a wage increase, because it is not practical for the factory to pay Anil 35 rupees while persisting in paying his siblings 25. Other factories, too, are now paying 35 rupees so there is no way that the owner of the firm could pay anyone less or reduce his costs by simply hiring fewer from Gowda and Bina’s family.

Gowda, Bina and their family are experiencing the process of economic growth—an increase in average incomes—made possible by the structural transformation of a dual economy, namely the reduction in size of the informal sector and the increased employment in the capitalist sector.

How many times will the recruiters return to the village? To answer this question, we need a model of the textile factory, its hiring and its profits.

Suppose that the technology used in the factory requires one machine for each worker employed. Working with a machine, each worker can produce 70 rupees of output per day. But the employer incurs costs: not only wages, but the costs of installing and maintaining the machines and providing dormitory accommodation for the workers. We will assume the costs of machinery and accommodation come to 30 rupees per worker per day.

Then we can work out the factory’s daily profit for each worker employed:

To maximize the total amount of profit, the owner of the factory would like to employ as many workers as possible, as long as the wage is below the net productivity of the worker.

Initially the recruiter was able to find workers willing to move to the city for a wage of 25 rupees, and the factory owner’s profits were high. The owner instructed the recruiter to continue returning to the village to find more workers. But since the textile business was so profitable, other factories opened up, and they were looking for workers too. A neighbouring factory offered 35 rupees, and the owner had to increase the wage to avoid losing workers. At this wage the recruiter was able to bring Anil to the city.

Will the wage remain at 35 rupees? No, because as long as the wage is below 40, the factories will all want to increase their employment, installing more machines, competing with each other for workers and sending their recruiters out to the villages. The wage will continue to rise, and more workers will migrate, until the wage reaches 40 rupees. But it won’t rise any further: the factories will not be willing to employ anyone at a wage greater than their net productivity.

Now we can work out how many of Gowda’s and Bina’s family will eventually move to the city, when the wage has reached 40 rupees. In Figure 6.10, the upward-sloping line shows how average daily income on the farm depends on the number of family members who work in the textile factory: it rises from 15 rupees when no-one migrates, to 50 rupees when 9 of the 10 family members work in the factory. The horizontal line shows the wage available to any worker who chooses to work in the factory.

The dual economy: average income on the farm and in the factory.

Figure 6.10 The dual economy: average income on the farm and in the factory.

The figure shows us that if fewer than seven family members work in the factory, the income of those left on the farm will be lower than the wage they could earn in the city, so they would be willing to move. But no more than seven would move, because the income on the farm would then be higher than the wage.

So looking at Figure 6.10 we see that the recruiter will hire all but one of the eight children, paying them 40 rupees each. Lakshmi will join her brothers and sisters at the factory. Gowda and Bina and the youngest of the children will remain on the farm, also with an income of 40 rupees each.

Seven family members working in the factory is a Nash equilibrium because none of those involved could do better given what the others are doing. The owner and his recruiter cannot pay less, because their workers would quit to work in another factory. If any of Gowda’s and Bina’s family were to return to the farm, there would be four people farming the land, and their average income would be only 35. And the three remaining on the farm have no incentive to move to the factory, because their income would be no higher.

Is this the end of the structural transformation of the dual economy? Recall from Unit 2 that competition among firms in the capitalist sector leads them to seek to find ways of raising the productivity of their workers so that they can make more profits. The dashed horizontal line in the Figure 6.10 shows the effect of a technological improvement—a better weaving machine, for example—that raises the net productivity of labour to 50.

Now factories will be willing to pay higher wages to increase employment. They all want to expand and recruiters will be sent back to the villages. As the wage rises above 45 rupees, both Bina and the remaining child will agree to join the rest of the family working in the factory. Gowda now farms the land alone.

If this were to happen across a great many villages and factories, average incomes would have risen in the economy as a whole, for two reasons:

  • People have shifted from low productivity work in the informal economy to higher productivity work in the capitalist economy
  • Because average income rose in the informal economy, owners of firms were forced to pay higher wages in order to attract workers to their firms.

This description of the transformation of a dual economy is related to a model that was developed by William Arthur Lewis in an article titled ‘Development with Unlimited Supplies of Labour’.

Great economists William Arthur Lewis

Arthur Lewis

Arthur Lewis was born in 1916 in St. Lucia, then a British colony. In 1979, he was awarded the Nobel Memorial Prize in Economic Sciences (together with Theodore Schultz) ‘for their pioneering research into economic development research with particular consideration of the problems of developing countries.’20

Lewis had finished secondary school at age 14. As a younger boy, required to remain at home for a couple of months due to illness, he learned so much studying by himself and being taught by his father that when he returned to school he was transferred from grade 4 to grade 6. ‘I wanted to be an engineer’, he wrote, ‘but this seemed pointless since neither the government nor the white firms would employ a black engineer.’

Lewis observed that low income countries differed from high income countries in two ways. First, they had large populations of workers relative to the amount of capital goods. Second, most of the population worked in the informal sector, while a minority worked in the capitalist sector. His model of the process of economic ‘development’ in poor countries involves the movement of surplus labour from the informal to the capitalist sector, till the point where all the surplus labour is exhausted.

In the opening paragraph of his 1954 paper, in which what is now called the Lewis model was presented, he wrote in the opening paragraph: ‘The classics, from Smith to Marx, enquired how production grows through time [and] determined simultaneously income distribution and income growth’.21 He sought to return the attention of contemporary economists to the essential questions that were asked by the first economists.

Question 6.9 Choose the correct answer(s)

Based on the information in Figure 6.9a and Figure 6.10, which of the following statements are true?

  • Since the marginal product is 0 for the sixth person onwards, five members of the family should agree to work in the textile factory as long as the wage is above 0.
  • If the wage in the textile factory is 21, then three members working in the textile factory will be a Nash equilibrium.
  • If the wage in the textile factory increases from 20 to 40, then 4 more family members will decide to work in the textile factory.
  • If the wage in the textile factory is 20, then the total family income will be 200 Rupees.
  • The decision depends on the wage offered by the factory. If the average income for the family members remaining in the village is higher than the wage offered, then no more family members would choose to work in the factory.
  • When the wage is 21, the family members remaining in the village have the same wage as the family members in the factory, so there is no incentive to change behaviour.
  • If the wage is 20, 3 family members will go to work in the factory. If the wage is 40, 7 members will go.
  • If the wage is 20, 3 family members will work in the textiles factory and the remaining 7 members on the farm earn 21 each, so the total income is (3 × 20) + (7 × 21) = 207 rupees.

Exercise 6.9 Collective or individual decisions

In Gowda’s and Bina’s family, each member of the family makes their own decision about whether they should work on the farm, or move to the city. Suppose that instead they all agreed to make a collective decision on how many of them should go to work in the factory.

  1. When the factory wage is 40 rupees could the family members increase family income if they agreed to send more than seven members to the factory? If so, what average income could they obtain?
  2. Suppose that the factory wage was 30 rupees. How many members should the family agree to send to the factory to maximise family income? What average income would they achieve? How does this compare with average income in the Nash equilibrium where they all make independent decisions?

6.10 Principals and agents: Interactions under incomplete contracts

In the relationship between Manisha and her employer, Manisha’s work effort matters to both parties but is not covered by the employment contract. This leads to the existence of employment rents. If they had been able to write a complete contract, the situation would have been quite different. The employer could have offered her an enforceable contract specifying both the wage and the exact level of effort she should provide, and if these terms were acceptable to her, she would have agreed and worked as required. To maximize his profit he would have chosen a contract that was only just acceptable, so she would not have earned any rents.

This example is not unusual. In practice, all employment relationships are governed by incomplete contracts. Employment contracts often do not even bother to mention that the worker should work hard and well. And there are many other ways in which we interact without a complete contract:

  • People and banks lend money in return for a promise to repay the full amount plus the stipulated interest. But this may be unenforceable if the borrower is unable to repay.
  • Owners of firms would like managers to maximize the value of the owners’ assets, but managers have their own objectives (first class air travel, lavish offices) and managerial contracts often fall short of an enforceable requirement to maximize the owners’ wealth.
  • The contracts signed by tenants renting apartments may include clauses requiring that they maintain the value of the property. But aside from gross neglect, the liability for not maintaining the property is unenforceable.
  • Insurance contracts require (but typically cannot enforce) that the people who purchase insurance should behave prudently and try not to take risks.
  • Families devote a sizeable fraction of their budgets to purchasing educational and health services, the quality of which is rarely specified in a contract (and would be unenforceable if it were).
  • Parents care for their children with the hope, but no contractual assurance, that their children will reciprocate when the parents are old and unable to work.

For these and a great many other exchanges, it appears that Emile Durkheim (1858–1917), the founder of modern sociology, was right when he observed that ‘not everything in the contract is contractual.’ As above, there is usually something that matters to at least one of the parties that cannot be written down in an enforceable contract.

Why are contracts incomplete?

Thinking about some examples of economic interactions, we can see that there are several reasons for the absence of a complete contract:

  • Information is not verifiable: For a contract to be enforceable, relevant information must be observable by both parties, but also verifiable by third parties such as courts of law. The court must be able to establish whether or not the requirements of the contract were met. Verifiable information is often unavailable: for example, it may be impossible to prove whether the poor condition of a rented apartment is due to normal wear and tear or the tenant’s negligence.
  • Time and uncertainty: A contract is generally executed over a period of time, for example specifying that Party A does X now and Party B does Y later. But what B should do later may depend on things that are unknown when the contract is written. People are unlikely to be able to anticipate every possible thing that might happen in future—and trying to do so would probably not be cost-effective.
  • Measurement: Many services and goods are inherently difficult to measure or describe precisely enough to be written into a contract. How would the restaurant owner measure how pleasantly his waiters interact with customers?
  • Absence of a judiciary: For some transactions there are no judicial institutions (courts or other relevant third parties) capable of enforcing contracts. Many international transactions are of this type.
  • Preferences: Even where the nature of the goods or services to be exchanged would permit a more complete contract, a less complete contract might be preferred. Intrusive surveillance of workers by employers may backfire if the employer’s distrust angers the workers, leading to less satisfactory work performance. You do not necessarily want to know the exact quality of a concert before you buy the ticket—discovering it may be part of the experience.

Principal–agent models

principal–agent relationship
This relationship exists when one party (the principal) would like another party (the agent) to act in some way, or have some attribute that is in the interest of the principal, and that cannot be enforced or guaranteed in a binding contract. Also known as: principal–agent problem. See also: incomplete contract.

Many contractual relationships can be modelled in the same way, as a game between two players, whom we call the principal and the agent, who face a conflict of interest. These are known as principal–agent problems. In the case of Manisha and her employer, the employer is the principal. He would like to offer Manisha, the agent, an employment contract, and she wants the job, but the amount of effort she will provide cannot be specified in the contract because it is not verifiable. This is a problem because there is a conflict of interest: he would prefer her to work hard, whereas Manisha prefers an easy life.

Our model of Manisha’s employment is an example of a general class of principal–agent models, in which an action taken by the agent is ‘hidden’ from the principal, or ‘unobservable’.

  • The agent can take some action (such as working hard),
  • the principal benefits from this action,
  • but taking the action is something the agent would not choose to do, perhaps because it is costly or unpleasant (this is the conflict of interest),
  • and because information about the action is either not available to the principal or is not verifiable,
  • there is no way that the principal can use an enforceable contract to guarantee that the action is performed.
hidden actions (problem of)
This occurs when some action taken by one party to an exchange is not known or cannot be verified by the other. For example, the employer cannot know (or cannot verify) how hard the worker she has employed is actually working. Also known as: moral hazard. See also: hidden attributes (problem of).

In short: a hidden action problem occurs when there is a conflict of interest between the principal and the agent over some action that may be taken by the agent, and this action cannot be subjected to a complete contract. In these problems, information about the action is either asymmetric (the agent knows what action is taken, but the principal doesn’t) or unverifiable (it cannot be used by a court to enforce a contract).

The table in Figure 6.11 identifies the principals and agents in the examples from this section.

Principal Agent Action that is hidden, and not covered in the contract
Employer Employee Quality and quantity of work
Banker Borrower Repayment of loan, prudent conduct
Owner Manager Maximization of owners’ profits
Landlord Tenant Care of the apartment
Insurance company Insured Prudent behavior
Parents Teacher/doctor Quality of teaching and care
Parents Children Care in old age

Figure 6.11 Hidden action problems.

Verifiable information, asymmetric information

Information is verifiable if it can be used in court to enforce a contract. Non-verifiable information, such as hearsay, cannot be used to enforce contracts.

Information that is known by one party but not another is asymmetric.

We study the banker-borrower principal–agent model in Unit 10. In Unit 12 we will introduce the second main class of principal–agent models, in which it is not the agent’s action that cannot be contracted (hidden action) but rather something about the agent herself that is unknown to the principal (hidden attribute).

Exercise 6.9 Principal–agent relationships

For each of the following examples, explain who is the principal, who is the agent, and what aspects of their interaction are of interest to each and are not covered by a complete contract.

  1. A company hires a security guard to protect its premises at night.
  2. A charity wants to commission research to find out as much as possible about a new virus.

6.11 Conclusion

The economy consists of a huge diversity of firms, large and small, with differing kinds of technology, some employing wage workers and others operating only with family labour. The process of structural change and economic development results in the substitution of firms running with family labour with those that employ wage workers. Such firms, that use other people’s hired labour and often other people’s money, are called capitalist firms.

The products of people’s labour may be transferred to others in markets, or within firms through employment contracts. To understand the role of the firm, we view it not only as an actor, but also a stage on which three sets of actors (owners, managers, and employees) interact. Principal–agent models help us understand how firms work by identifying the consequences of the conflicts of interest between the actors, when these cannot be resolved by complete contracts.

Employment contracts are incomplete: they can cover hours and some working conditions, but not the effort provided by the employee, which is not verifiable. So employers set wages that are higher than workers’ reservation wages. Workers receive an employment rent, which motivates them to work hard and deters them from quitting. When all employers set wages in this way, there will be involuntary unemployment in the economy. Public policies such as the provision of unemployment benefits change workers’ reservation wages and best response curves, and so affect the wage-setting process.

In many low-income countries, unemployment benefits are not the norm. These economies are characterized by a large traditional sector (usually agriculture) with a large number of workers, and a relatively smaller modern sector (usually industry), paying higher wages. Over time, workers from the traditional sector migrate to the modern sector in search of higher wages, and this process transforms the structure of the economy. In such situations, the traditional sector becomes the fallback option in lieu of unemployment benefits.

Concepts introduced in Unit 6

Before you move on, review these definitions:

6.12 References

  • Bewley, Truman F. 1999. Why Wages Don’t Fall during a Recession. Cambridge, MA: Harvard University Press.
  • Braverman, Harry, and Paul M. Sweezy. 1975. Labor and Monopoly Capital: The Degradation of Work in the Twentieth Century, 2nd ed. New York, NY: Monthly Review Press.
  • Coase, Ronald H. 1937. ‘The Nature of the Firm’. Economica 4 (16): pp. 386–405.
  • Coase, Ronald H. 1992. ‘The Institutional Structure of Production’. American Economic Review 82 (4): pp. 713–19.
  • Couch, Kenneth A., and Dana W. Placzek. 2010. ‘Earnings Losses of Displaced Workers Revisited’. American Economic Review 100 (1): pp. 572–589.
  • Ehrenreich, Barbara. 2011. Nickel and Dimed: On (Not) Getting By in America. New York, NY: St. Martin’s Press.
  • Hansmann, Henry. 2000. The Ownership of Enterprise. Cambridge, MA: Belknap Press.
  • Helper, Susan, Morris Kleiner, and Yingchun Wang. 2010. ‘Analyzing Compensation Methods in Manufacturing: Piece Rates, Time Rates, or Gain-Sharing?’. NBER Working Papers No. 16540, National Bureau of Economic Research, Inc.
  • Jacobson, Louis, Robert J. Lalonde, and Daniel G. Sullivan. 1993. ‘Earnings Losses of Displaced Workers’. The American Economic Review 83 (4): pp. 685–709.
  • Kletzer, Lori G. 1998. ‘Job Displacement’. Journal of Economic Perspectives 12 (1): pp. 115–136.
  • Kroszner, Randall S., and Louis Putterman (editors). 2009. The Economic Nature of the Firm: A Reader, 3rd ed. Cambridge: Cambridge University Press.
  • Krueger, Alan B., and Alexandre Mas. 2004. ‘Strikes, Scabs, and Tread Separations: Labor Strife and the Production of Defective Bridgestone/Firestone Tires’. Journal of Political Economy 112 (2): pp. 253–289.
  • Lazear, Edward P., Kathryn L. Shaw, and Christopher Stanton. 2016. ‘Making Do with Less: Working Harder during Recessions’. Journal of Labor Economics 34 (S1 Part 2): pp. 333–360.
  • Lewis, Arthur William. 1954. ‘Economic Development with Unlimited Supplies of Labour’. The Manchester School 22(2): pp. 139–191.
  • Marx, Karl. 1906. Capital: A Critique of Political Economy. New York, NY: Random House.
  • Marx, Karl. 2010. The Communist Manifesto. London: Arcturus Publishing.
  • Micklethwait, John, and Adrian Wooldridge. 2003. The Company: A Short History of a Revolutionary Idea. New York, NY: Modern Library.
  • Mill, John Stuart. 1994. Principles of Political Economy. New York: Oxford University Press.
  • Mill, John Stuart. 2002. On Liberty. Mineola, NY: Dover Publications.
  • O’Reilly, Tim, and Eric S. Raymond. 2001. The Cathedral & the Bazaar: Musings on Linux and Open Source by an Accidental Revolutionary. Sebastopol, CA: O’Reilly.
  • Pencavel, John. 2002. Worker Participation: Lessons from the Worker Co-ops of the Pacific Northwest. New York, NY: Russell Sage Foundation Publications.
  • Simon, Herbert A. 1951. ‘A Formal Theory of the Employment Relationship’. Econometrica 19 (3).
  • Simon, Herbert A. 1991. ‘Organizations and Markets’. Journal of Economic Perspectives 5 (2): pp. 25–44.
  • Toynbee, Polly. 2003. Hard Work: Life in Low-pay Britain. London: Bloomsbury Publishing.
  • Williamson, Oliver E. 1985. The Economic Institutions of Capitalism. New York, NY: Collier Macmillan.
  1. Among the institutions of modern capitalist economies, the firm rivals the government in importance. John Micklethwait and Adrian Wooldridge explain how this happened. John Micklethwait and Adrian Wooldridge. 2003. The Company: A Short History of a Revolutionary Idea. New York, NY: Modern Library. 

  2. Why do firms work the way they do? For example, why do the owners of the firm hire the workers, rather than the other way around? Randall Kroszner and Louis Putterman summarize this field of economics. Randall S. Kroszner and Louis Putterman (editors). 2009. The Economic Nature of the Firm: A Reader. Cambridge: Cambridge University Press. 

  3. Herbert A. Simon. 1991. ‘Organizations and Markets’. Journal of Economic Perspectives 5 (2): pp. 25–44. 

  4. Herbert A. Simon. 1951. ‘A Formal Theory of the Employment Relationship’. Econometrica 19 (3). 

  5. These two books describe the property rights, authority structures, and market interactions that characterize the modern capitalist firm.

    Henry Hansmann. 2000. The Ownership of Enterprise. Cambridge, MA: Belknap Press.

    Oliver E. Williamson. 1985. The Economic Institutions of Capitalism. New York, NY: Collier Macmillan. 

  6. Ronald H. Coase. 1937. ‘The Nature of the Firm’. Economica 4 (16): pp. 386–405. 

  7. Ronald H. Coase. 1992. ‘The Institutional Structure of Production’. American Economic Review 82 (4): pp. 713–19. 

  8. Karl Marx. (1848) 2010. The Communist Manifesto. Edited by Friedrich Engels. London: Arcturus Publishing. 

  9. Karl Marx. (1848) 2010. The Communist Manifesto. Edited by Friedrich Engels. London: Arcturus Publishing. Karl Marx. 1906. Capital: A Critique of Political Economy. New York, NY: Random House. 

  10. Susan Helper, Morris Kleiner, and Yingchun Wang. 2010. ‘Analyzing Compensation Methods in Manufacturing: Piece Rates, Time Rates, or Gain-Sharing?’. NBER Working Papers No. 16540, National Bureau of Economic Research, Inc. 

  11. Alan B. Krueger and Alexandre Mas. 2004. ‘Strikes, Scabs, and Tread Separations: Labor Strife and the Production of Defective Bridgestone/Firestone Tires’. Journal of Political Economy 112 (2): pp. 253–89. 

  12. Barbara Ehrenreich. 2011. Nickel and Dimed: On (Not) Getting By in America. New York, NY: St. Martin’s Press. 

  13. Polly Toynbee. 2003. Hard Work: Life in Low-pay Britain. London: Bloomsbury Publishing. 

  14. Harry Braverman and Paul M. Sweezy. 1975. Labor and Monopoly Capital: The Degradation of Work in the Twentieth Century. 2nd ed. New York, NY: Monthly Review Press. 

  15. Lori G. Kletzer. 1998. ‘Job Displacement’. Journal of Economic Perspectives 12 (1): pp. 115–36. 

  16. Kenneth A. Couch and Dana W. Placzek. 2010. ‘Earnings Losses of Displaced Workers Revisited’. American Economic Review 100 (1): pp. 572–89. 

  17. Louis Jacobson, Robert J. Lalonde, and Daniel G. Sullivan. 1993. ‘Earnings Losses of Displaced Workers’. The American Economic Review 83 (4): pp. 685–709. 

  18. Edward P. Lazear, Kathryn L. Shaw, and Christopher Stanton. 2016. ‘Making Do with Less: Working Harder during Recessions’. Journal of Labor Economics 34 (S1 Part 2): pp. 333-360. 

  19. Truman F. Bewley. 1999. Why Wages Don’t Fall during a Recession. Cambridge, MA: Harvard University Press. 

  20. Sir Arthur Lewis. Biographical. NobelPrize.org. Accessed 5th March. 

  21. Arthur William Lewis. 1954. ‘Economic Development with Unlimited Supplies of Labour’. The Manchester School 22(2). pp. 139-191.