OTHER TYPES OF IMPERFECT COMPETITION

Transcription

1 13 OTHER TYPES OF IMPERFECT COMPETITION LEARNING OBJECTIVES In this chapter you will: Analyze competition among firms that sell differentiated products Compare the outcome under monopolistic competition and under perfect competition Consider the desirability of outcomes in monopolistically competitive markets Examine what outcomes are possible when a market is an oligopoly Learn about the prisoners dilemma and how it applies to oligopoly and other issues Consider how competition laws try to foster competition in oligopolistic markets After reading this chapter you should be able to: Show the long-run adjustment that takes place in a monopolistically competitive market when a firm generates economic profits Show why monopolistically competitive firms produce at less-than-efficient scale in the long run Discuss the inefficiencies of monopolistically competitive markets Describe the characteristics of oligopoly and monopolistic competition Describe the conditions under which an oligopolistic market generates the same outcome as a monopolistic market Show why the outcome of the prisoners dilemma may change if the game is repeated Show why some business practices that appear to reduce competition may have a legitimate business purpose 301

2 302 Part 4 Microeconomics The Economics of Firms in Markets INTRODUCTION In Chapter 12 we looked at an extreme form of imperfect competition monopoly. We saw how a firm s behaviour might be different to that of a competitive market if it was the only supplier in the market. In most markets we do not see the extremes described in perfect competition or monopoly, instead there are often many firms competing with each other but with some very much larger than others. The competition between firms might be very localized, for example, between a number of restaurants in a typical city centre, be based on differences in price, on differences in the product or the quality of the service provided, or through exploiting human psychology to make it appear there is some difference between the product or encouraging some sort of loyalty to a product. These things and more are all characteristic of imperfect competition. In conditions of imperfect competition, products are not homogenous. There might be many substitutes for a good in the market but in some way or another, the firm tries to make their product different to rivals so that the degree of substitutability is reduced. In differentiating products the firm is able to have some control over the price that they charge. The sellers in this market are price makers rather than price takers and price will be above marginal cost. Monopolistic Competition monopolistic competition a market structure in which many firms sell products that are similar but not identical Because these markets have some features of competition and some features of monopoly it is called monopolistic competition. Monopolistic competition describes a market with the following attributes: Many sellers. There are many firms competing for the same group of customers with each firm being small compared to the market as a whole. Product differentiation. Each firm produces a product that is at least slightly different from those of other firms. The firm is able to have some control over the extent to which it can differentiate its product from its rivals, thus reducing the degree of substitutability and garnering an element of customer or brand loyalty. Therefore, rather than being a price taker, each firm faces a downward sloping demand curve. Free entry. Firms can enter (or exit) the market without restriction. Thus, the number of firms in the market adjusts until economic profits are driven to zero. Table 13.1 lists examples of the types of market with these attributes. TABLE 13.1 Examples of Markets Which Have Characteristics of Monopolistic Competition Computer games Restaurants Conference organizers Wedding planners Plumbing Coach hire Funeral directors Fabric manufacturers Tailors Music teachers Books CDs/DVDs Landscape architects Environmental consultants Furniture manufacturers Vets Hotel accommodation Air conditioning systems Pest control Removal services Beauty consultants Shop fitters Waste disposal Dentists Children s entertainers Gas engineers Steel fabricators Driving schools Opticians Chimney sweeps Four different toothpastes, one firm. How different are these products and how does the consumer know they are different? ALAMY

3 Chapter 13 Other Types of Imperfect Competition 303 COMPETITION WITH DIFFERENTIATED PRODUCTS To understand monopolistically competitive markets, we first consider the decisions facing an individual firm. We then examine what happens in the long run as firms enter and exit the industry. Next, we compare the equilibrium under monopolistic competition to the equilibrium under perfect competition. Finally, we consider whether the outcome in a monopolistically competitive market is desirable from the standpoint of society as a whole. The Monopolistically Competitive Firm in the Short Run Each firm in a monopolistically competitive market is, in many ways, like a monopoly. Because its product is different from those offered by other firms, it faces a downward sloping demand curve. If we assume that a monopolistically competitive firm aims for profit maximization it chooses the quantity at which marginal revenue equals marginal cost and then uses its demand curve to find the price consistent with that quantity. Figure 13.1 shows the cost, demand and marginal revenue curves for two typical firms, each in a different monopolistically competitive industry. In both panels of this figure, the profit-maximizing quantity is found at the intersection of the marginal revenue and marginal cost curves. The two panels in this figure show different outcomes for the firm s profit. In panel (a), price exceeds average total cost, so the firm makes a profit. In panel (b), price is below average total cost. In this case, the firm is unable to make a positive profit, so the best the firm can do is to minimize its losses. All this should seem familiar. A monopolistically competitive firm chooses its quantity and price just as a monopoly does. In the short run, these two types of market structure are similar. FIGURE 13.1 Monopolistic Competitors in the Short Run Monopolistic competitors maximize profit by producing the quantity at which marginal revenue equals marginal cost. The firm in panel (a) makes a profit because, at this quantity, price is above average total cost. The firm in panel (b) makes losses because, at this quantity, price is less than average total cost. (a) Firm makes profits (b) Firm makes losses Price Price MC ATC Losses MC ATC Price Average total cost Profit Demand Average total cost Price MR MR Demand 0 Profitmaximizing quantity Quantity 0 Lossminimizing quantity Quantity

4 304 Part 4 Microeconomics The Economics of Firms in Markets The Long-Run Equilibrium The situations depicted in Figure 13.1 do not last long. When firms are making profits, as in panel (a), new firms have an incentive to enter the market (remember that there is free entry and exit into the market). This entry means that more firms are now offering products for sale in the industry. The increase in supply causes the price received by all firms in the industry to fall. If an existing firm wishes to sell more, then it must reduce its price. There are now more substitutes available in the market and so the effect for firms is to shift the demand curve to the left. The effect is that there is an increase in the number of products from which customers can now choose and, therefore, reduces the demand faced by each firm already in the market. In other words, profit encourages entry, and entry shifts the demand curves faced by the incumbent firms to the left. As the demand for incumbent firms products falls, these firms experience declining profit. Conversely, when firms are making losses, as in panel (b), firms in the market have an incentive to exit. As firms exit, the supply will fall and price will rise. There are now fewer substitutes and so customers have fewer products from which to choose. This decrease in the number of firms effectively expands the demand faced by those firms that stay in the market. In other words, losses encourage exit, and exit has the effect of shifting the demand curves of the remaining firms to the right. As the demand for the remaining firms products rises, these firms experience rising profit (that is, declining losses). This process of entry and exit continues until the firms in the market are making exactly zero economic profit. Figure 13.2 depicts the long-run equilibrium. Once the market reaches this equilibrium, new firms have no incentive to enter, and existing firms have no incentive to exit.? what if a firm operating in a very localized market making short-run abnormal profit could erect some sort of barrier to entry would it still be able to make abnormal profits in the long run? FIGURE 13.2 A Monopolistic Competitor in the Long Run In a monopolistically competitive market, if firms are making profit, new firms enter and the demand curves for the incumbent firms shift to the left. Similarly, if firms are making losses, old firms exit and the demand curves of the remaining firms shift to the right. Because of these shifts in demand, a monopolistically competitive firm eventually finds itself in the long-run equilibrium shown here. In this long-run equilibrium, price equals average total cost, and the firm earns zero profit. Price MC ATC P 5 ATC MR Demand 0 Profit-maximizing quantity Quantity

5 Chapter 13 Other Types of Imperfect Competition 305 Notice that the demand curve in this figure just barely touches the average total cost curve. Mathematically, we say the two curves are tangent to each other. These two curves must be tangent once entry and exit have driven profit to zero. Because profit per unit sold is the difference between price (found on the demand curve) and average total cost, the maximum profit is zero only if these two curves touch each other without crossing. To sum up, two characteristics describe the long-run equilibrium in a monopolistically competitive market: As in a monopoly market, price exceeds marginal cost. This conclusion arises because profit maximization requires marginal revenue to equal marginal cost and because the downward sloping demand curve makes marginal revenue less than the price. As in a competitive market, price equals average total cost. This conclusion arises because free entry and exit drive economic profit to zero. The second characteristic shows how monopolistic competition differs from monopoly. Because a monopoly is the sole seller of a product without close substitutes, it can earn positive economic profit, even in the long run. By contrast, because there is free entry into a monopolistically competitive market, the economic profit of a firm in this type of market is driven to zero. Monopolistic versus Perfect Competition Figure 13.3 compares the long-run equilibrium under monopolistic competition to the long-run equilibrium under perfect competition. There are two noteworthy differences between monopolistic and perfect competition excess capacity and the mark-up. Excess Capacity As we have just seen, entry and exit drive each firm in a monopolistically competitive market to a point of tangency between its demand and average FIGURE 13.3 Monopolistic versus Perfect Competition Panel (a) shows the long-run equilibrium in a monopolistically competitive market, and panel (b) shows the long-run equilibrium in a perfectly competitive market. Two differences are notable. (1) The perfectly competitive firm produces at the efficient scale, where average total cost is minimized. By contrast, the monopolistically competitive firm produces at less than the efficient scale. (2) Price equals marginal cost under perfect competition, but price is above marginal cost under monopolistic competition. (a) Monopolistically competitive firm (b) Perfectly competitive firm Price Price MC ATC MC ATC Mark-up P Marginal cost P 5 MC P 5 MR (demand curve) MR Demand 0 Quantity produced Efficient scale Quantity 0 Quantity produced 5 efficient scale Quantity Excess capacity

6 306 Part 4 Microeconomics The Economics of Firms in Markets total cost curves. Panel (a) of Figure 13.3 shows that the quantity of output at this point is smaller than the quantity that minimizes average total cost. Thus, under monopolistic competition, firms produce on the downward sloping portion of their average total cost curves. In this way, monopolistic competition contrasts starkly with perfect competition. As panel (b) of Figure 13.3 shows, free entry in competitive markets drives firms to produce at the minimum of average total cost. The quantity that minimizes average total cost is called the efficient scale of the firm. In the long run, perfectly competitive firms produce at the efficient scale, whereas monopolistically competitive firms produce below this level. Firms are said to have excess capacity under monopolistic competition. In other words, a monopolistically competitive firm, unlike a perfectly competitive firm, could increase the quantity it produces and lower the average total cost of production. Mark-Up Over Marginal Cost A second difference between perfect competition and monopolistic competition is the relationship between price and marginal cost. For a competitive firm, such as that shown in panel (b) of Figure 13.3, price equals marginal cost. For a monopolistically competitive firm, such as that shown in panel (a), price exceeds marginal cost, because the firm always has some market power. How is this mark-up over marginal cost consistent with free entry and zero profit? The zero-profit condition ensures only that price equals average total cost. It does not ensure that price equals marginal cost. Indeed, in the long-run equilibrium, monopolistically competitive firms operate on the declining portion of their average total cost curves, so marginal cost is below average total cost. Thus, for price to equal average total cost, price must be above marginal cost. Because of this a monopolistically competitive firm is always eager to get another customer. Because its price exceeds marginal cost, an extra unit sold at the posted price means more profit. One characteristic of monopolistic competition is the use of advertising and establishment of brand names. We looked at advertising and branding in Chapter 7 and suffice to say that these are important in understanding the behaviour of firms in imperfect competition. Summary A monopolistically competitive market is characterized by three attributes: many firms, differentiated products and free entry. The equilibrium in a monopolistically competitive market differs from that in a perfectly competitive market in two related ways. First, each firm in a monopolistically competitive market has excess capacity. That is, it operates on the downward sloping portion of the average total cost curve. Secondly, each firm charges a price above marginal cost. Monopolistic competition does not have all the desirable properties of perfect competition. There is the standard deadweight loss of monopoly caused by the mark-up of price over marginal cost. In addition, the number of firms (and thus the variety of products) can be too large or too small. In practice, the ability of policy makers to correct these inefficiencies is limited. The product differentiation inherent in monopolistic competition leads to the use of advertising and brand names. Table 13.2 summarizes the differences between monopolistic competition, perfect competition and monopoly. Quick Quiz List the three key attributes of monopolistic competition. Draw and explain a diagram to show the long-run equilibrium in a monopolistically competitive market. How does this equilibrium differ from that in a perfectly competitive market?

7 Chapter 13 Other Types of Imperfect Competition 307 TABLE 13.2 Monopolistic Competition: Between Perfect Competition and Monopoly Market Structure Market Structure Perfect competition Monopolistic competition Monopoly Features that all three market structures share Goal of firms Maximize profits Maximize profits Maximize profits Rule for maximizing MR = MC MR = MC MR = MC Can earn economic profits in the short run? Yes Yes Yes Features that monopoly and monopolistic competition share Price taker? Yes No No Price P = MC P > MC P > MC Produces welfare-maximizing level of output? Yes No No Features that perfect competition and monopolistic competition share Number of firms Many Many One Entry in long run? Yes Yes No Can earn economic profits in long run? No No Yes FYI Contestable Markets Most economics textbooks up to the late 1970s covered market structures ranging from perfect competition at one extreme to monopoly at the other. Changes in the way businesses actually operated in the real world meant that there were some gaps between the theory and the observed behaviour of firms. This led to the development of a new theory which was incorporated into the explanation of market structures. The theory of contestable markets was developed by William J. Baumol, John Panzar and Robert Willig in The key characteristic of a perfectly contestable market (the benchmark to explain firms behaviours) was that firms were influenced by the threat of new entrants into a market. We have seen how, in monopolistically competitive markets, despite the fact that each firm has some monopoly control over its product, the ease of entry and exit means that in the long run profits can be competed away as new firms enter the market. This threat of new entrants may make firms behave in a way that departs from what was assumed to be the traditional goal of firms to maximize profits. The suggestion by Baumol and colleagues was that firms may deliberately limit profits made to discourage new entrants. The other characteristics of a perfectly contestable market are that there are no barriers to entry or exit and no sunk costs. Profits might be limited by what was termed entry limit pricing. This refers to a situation where a firm will keep prices lower than they could be in order to deter new entrants. Similarly, firms may also practise predatory or destroyer pricing whereby the price is held below average cost for a period to try and force out competitors or prevent new firms from entering the market. Incumbent firms may be in a position to do this because they may have been able to gain some advantages of economies of scale which new entrants may not be able to exploit. In a contestable market firms may also erect other artificial barriers to prevent entry into the industry by new firms. Such barriers might include operating at over-capacity, which provides the opportunity to flood the market and drive down price in the event of a threat of entry. Firms will also carry out aggressive marketing and branding strategies to tighten up the market or find ways of reducing costs and increasing efficiency to gain competitive advantage. Searching out sources of competitive advantage was a topic written on extensively by Michael Porter, who defined competitive advantage as being the advantages firms can gain over another which are both distinctive and defensible. These sources are not simply to be found in terms of new product development but through

8 308 Part 4 Microeconomics The Economics of Firms in Markets close investigation and analysis of the supply chain, where little changes might make a difference to the cost base of a firm which it can then exploit to its advantage. Hit-and-run tactics might be evident in a contestable market where firms enter the industry, take the profit and get out quickly (possible because of the freedom of entry and exit). In other cases firms may indulge in what is termed cream-skimming identifying parts of the market that are high in value added and exploiting those markets. The theory of contestable markets has been widely adopted as a beneficial addition to the theory of the firm and there has been extensive research into its application. There are numerous examples of markets exhibiting contestability characteristics including financial services; airlines, especially flights on domestic routes; the IT industry and in particular internet service providers (ISPs), software and web developers; energy supplies and the postal service. oligopoly competition amongst the few a market structure in which only a few sellers offer similar or identical products and dominate the market WIKIMEDIA OLIGOPOLY The Europeans love chocolate. The average German eats about gram bars of chocolate a year. The Belgians are not far behind at 177 bars, the Swiss around 173 and the British eat around 164 bars per year. There are many firms producing chocolate in Europe including Anthon Berg in Denmark, Camille Bloch, Lindt and Favarger in Switzerland, Guylian and Godiva in Belgium, and Hachez in Germany. However, Europeans are likely to find that what they are eating has probably been made by one of three companies: Cadbury (now owned by US firm Kraft), Mars or Nestlé. These firms dominate the chocolate industry in the European Union. Being so large and dominant they are able to influence the quantity of chocolate bars produced and, given the market demand curve, the price at which chocolate bars are sold. The European market for chocolate bars fits a model of imperfect competition called oligopoly literally, competition amongst the few. The essence of an oligopolistic market is that there are a few sellers which dominate the market and where the products they sell are identical or near identical. In this situation, competition between these large firms might be focused on strategic interactions among them. As a result, the actions of any one seller in the market can have a large impact on the profits of all the other sellers. That is, oligopolistic firms are interdependent in a way that competitive firms are not. There is no magic number that defines few from many when counting the number of firms. Do the approximately dozen companies that now sell cars in Europe make this market an oligopoly or more competitive? The answer is open to debate. Similarly, there is no sure way to determine when products are differentiated and when they are identical. Are different brands of milk really the same? Again, the answer is debatable. When analyzing actual markets, economists have to keep in mind the lessons learned from studying all types of market structure and then apply each lesson as it seems appropriate. Our goal is to see how the interdependence that characterizes oligopolistic markets shapes the firms behaviour and what problems it raises for public policy. MARKETSWITHONLYAFEW DOMINANT SELLERS If a market is dominated by a relatively small number of sellers it is said to be concentrated. The concentration ratio refers to the proportion of the total market share accounted for by the top x number of firms in the industry. For example, a five-firm concentration ratio of 80 per cent means that five firms account for 80 per cent of market share; a three-firm concentration ratio of 72 per cent would indicate that three firms account for 72 per cent of total market sales and so on.

9 Chapter 13 Other Types of Imperfect Competition 309 There are a number of examples of oligopolistic market structures including brewing, banking, mobile phone networks, the chemical and oil industries, the grocery/supermarket industry, detergents, and entertainment. Note that in each of these industries there might be many sellers in the industry (there are thousands of small independent breweries across Europe, for example) but sales are dominated by a relatively small number of firms. In brewing, the industry is dominated by A-BInBev, Heineken, Carlsberg and SABMiller. A key feature of oligopoly is the tension that exists between the firms of cooperation and self-interest. The group of oligopolists is best off cooperating and acting like a monopolist producing a small quantity of output and charging a price above marginal cost. Yet because each oligopolist cares about only its own profit, there are powerful incentives at work that hinder a group of firms from maintaining the monopoly outcome. A Duopoly Example To understand the behaviour of oligopolies, let s consider an oligopoly with only two members, called a duopoly. Duopoly is the simplest type of oligopoly. Oligopolies with three or more members face the same problems as oligopolies with only two members, so we do not lose much by starting with the case of duopoly. Imagine a town in which only two residents Ishaq and Coralie own wells that produce water safe for drinking. Each Saturday, Ishaq and Coralie decide how many litres of water to pump, bring the water to town, and sell it for whatever price the market will bear. To keep things simple, suppose that Ishaq and Coralie can pump as much water as they want without cost. That is, the marginal cost of water equals zero. Table 13.3 shows the town s demand schedule for water. The first column shows the total quantity demanded, and the second column shows the price. If the two well owners sell a total of 10 litres of water, water goes for 110 a litre. If they sell a total of 20 litres, the price falls to 100 a litre. And so on. If you graphed these two columns of numbers, you would get a standard downward sloping demand curve. The last column in Table 13.3 shows the total revenue from the sale of water. It equals the quantity sold times the price. Because there is no cost to pumping water, the total revenue of the two producers equals their total profit. Let s now consider how the organization of the town s water industry affects the price of water and the quantity of water sold. ALAMY A duopoly sees two dominant firms competing against each other will it always be a fight? TABLE 13.3 The Demand Schedule for Water Quantity (in litres) Price Total revenue (and total profit)

10 310 Part 4 Microeconomics The Economics of Firms in Markets Competition, Monopolies and Cartels collusion an agreement amongst firms in a market about quantities to produce or prices to charge cartel a group of firms acting in unison Consider what would happen if the market for water were perfectly competitive. In a competitive market, the production decisions of each firm drive price equal to marginal cost. In the market for water, marginal cost is zero. Thus, under competition, the equilibrium price of water would be zero, and the equilibrium quantity would be 120 litres. The price of water would reflect the cost of producing it, and the efficient quantity of water would be produced and consumed. Now consider how a monopoly would behave. Table 13.3 shows that total profit is maximized at a quantity of 60 litres and a price of 60 a litre. A profit-maximizing monopolist, therefore, would produce this quantity and charge this price. As is standard for monopolies, price would exceed marginal cost. The result would be inefficient, for the quantity of water produced and consumed would fall short of the socially efficient level of 120 litres. What outcome should we expect from our duopolists? One possibility is that Ishaq and Coralie get together and agree on the quantity of water to produce and the price to charge for it. Such an agreement among firms over production and price is called collusion, and the group of firms acting in unison is called a cartel. Once a cartel is formed, the market is in effect served by a monopoly, and we can apply our analysis from Chapter 12. That is, if Ishaq and Coralie were to collude, they would agree on the monopoly outcome because that outcome maximizes the total profit that the producers can get from the market. Our two producers would produce a total of 60 litres, which would be sold at a price of 60 a litre. Once again, price exceeds marginal cost, and the outcome is socially inefficient.? what if one of the firms entering into a cartel had much more market power than the other firms in the agreement would this mean the cartel is more likely to succeed or not? A cartel must agree not only on the total level of production but also on the amount produced by each member. In our case, Ishaq and Coralie must agree how to split between themselves the monopoly production of 60 litres. Each member of the cartel will want a larger share of the market because a larger market share means larger profit. If Ishaq and Coralie agreed to split the market equally, each would produce 30 litres, the price would be 60 a litre and each would get a profit of CASE STUDY OPEC and the World Oil Market Our story about the town s market for water is fictional, but if we change water to crude oil, and Ishaq and Coralie to Iran and Iraq, the story is close to being true. Much of the world s oil is produced by a few countries, mostly in the Middle East. These countries together make up an oligopoly. Their decisions about how much oil to pump are much the same as Ishaq and Coralie s decisions about how much water to pump. The countries that produce most of the world s oil have formed a cartel, called the Organization of Petroleum Exporting Countries (OPEC). As originally formed in 1960, OPEC included Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela. By 1973, eight other nations had joined: Qatar, Indonesia, Libya, the United Arab Emirates, Algeria, Nigeria, Ecuador and Gabon. These countries control about three-fourths of the world s oil reserves. Like any cartel, OPEC tries to raise the price of its product

11 Chapter 13 Other Types of Imperfect Competition 311 through a coordinated reduction in quantity produced. OPEC tries to set production levels for each of the member countries. The problem that OPEC faces is much the same as the problem that Ishaq and Coralie face in our story. The OPEC countries would like to maintain a high price for oil. But each member of the cartel is tempted to increase its production to get a larger share of the total profit. OPEC members frequently agree to reduce production but then cheat on their agreements. OPEC was most successful at maintaining cooperation and high prices in the period from 1973 to The price of crude oil rose from $3 a barrel in 1972 to $11 in 1974 and then to $35 in But in the mid-1980s, member countries began arguing about production levels, and OPEC became ineffective at maintaining cooperation. By 1986 the price of crude oil had fallen back to $13 a barrel. In recent years, the members of OPEC have continued to meet regularly, but the cartel has been less successful at reaching and enforcing agreements. Although the price of oil rose significantly in 2007 and 2008, the primary cause was increased demand in the world oil market, in part from a booming Chinese economy, rather than restricted supply. While this lack of cooperation among OPEC nations has reduced the profits of the oil-producing nations below what they might have been, it has benefited consumers around the world. The Equilibrium For an Oligopoly Although oligopolists would like to form cartels and earn monopoly profits, often that is not possible. Competition laws prohibit explicit agreements among oligopolists as a matter of public policy. In addition, squabbling among cartel members over how to divide the profit in the market sometimes makes agreement among them impossible. Let s therefore consider what happens if Ishaq and Coralie decide separately how much water to produce. At first, one might expect Ishaq and Coralie to reach the monopoly outcome on their own, for this outcome maximizes their joint profit. In the absence of a binding agreement, however, the monopoly outcome is unlikely. To see why, imagine that Ishaq expects Coralie to produce only 30 litres (half of the monopoly quantity). Ishaq might reason as follows: I could produce 30 litres as well. In this case, a total of 60 litres of water would be sold at a price of 60 a litre. My profit would be 1800 (30 litres 60 a litre). Alternatively, I could produce 40 litres. In this case, a total of 70 litres of water would be sold at a price of 50 a litre. My profit would be 2000 (40 litres 50 a litre). Even though total profit in the market would fall, my profit would be higher, because I would have a larger share of the market. Of course, Coralie might reason the same way. If so, Ishaq and Coralie would each bring 40 litres to town. Total sales would be 80 litres, and the price would fall to 40. Thus, if the duopolists individually pursue their own self-interest when deciding how much to produce, they produce a total quantity greater than the monopoly quantity, charge a price lower than the monopoly price and earn total profit less than the monopoly profit. Although the logic of self-interest increases the duopoly s output above the monopoly level, it does not push the duopolists to reach the competitive allocation. Consider what happens when each duopolist is producing 40 litres. The price is 40, and each duopolist makes aprofitof In this case, Ishaq s self-interested logic leads to a different conclusion: Right now my profit is Suppose I increase my production to 50 litres. In this case, a total of 90 litres of water would be sold, and the price would be 30 a litre. Then my profit would be only Rather than increasing production and driving down the price, I am better off keeping my production at 40 litres.

12 312 Part 4 Microeconomics The Economics of Firms in Markets Nash equilibrium a situation in which economic actors interacting with one another each choose their best strategy given the strategies that all the other actors have chosen The outcome in which Ishaq and Coralie each produce 40 litres looks like some sort of equilibrium. In fact, this outcome is called a Nash equilibrium (named after economic theorist John Nash, whose life was portrayed in the book, A Beautiful Mind, and the film of the same name). A Nash equilibrium is a situation in which economic actors interacting with one another each choose their best strategy given the strategies the others have chosen. In this case, given that Coralie is producing 40 litres, the best strategy for Ishaq is to produce 40 litres. Similarly, given that Ishaq is producing 40 litres, the best strategy for Coralie is to produce 40 litres. Once they reach this Nash equilibrium, neither Ishaq nor Coralie has an incentive to make a different decision. /MARKET-STRUCTURES/OLIGOPOLY/) This example illustrates the tension between cooperation and self-interest. Oligopolists would be better off cooperating and reaching the monopoly outcome. Yet because they pursue their own self-interest, they do not end up reaching the monopoly outcome and maximizing their joint profit. Each oligopolist is tempted to raise production and capture a larger share of the market. As each of them tries to do this, total production rises, and the price falls. At the same time, self-interest does not drive the market all the way to the competitive outcome. Like monopolists, oligopolists are aware that increases in the amount they produce reduce the price of their product. Therefore, they stop short of following the competitive firm s rule of producing up to the point where price equals marginal cost. In summary, when firms in an oligopoly individually choose production to maximize profit, they produce a quantity of output greater than the level produced by monopoly and less than the level produced by competition. The oligopoly price is less than the monopoly price but greater than the competitive price (which equals marginal cost). JEOPARDY PROBLEM An oligopolistic market consists of a four-firm concentration ratio of 80 per cent. An economist does some research on this market and finds that prices have remained stable in the market for the last five years. What might the explanation be for this behaviour?

13 Chapter 13 Other Types of Imperfect Competition 313 How the Size of an Oligopoly Affects the Market Outcome We can use the insights from this analysis of duopoly to discuss how the size of an oligopoly is likely to affect the outcome in a market. Suppose, for instance, that Jean and Patrice suddenly discover water sources on their property and join Ishaq and Coralie in the water oligopoly. The demand schedule in Table 13.3 remains the same, but now more producers are available to satisfy this demand. How would an increase in the number of sellers from two to four affect the price and quantity of water in the town? If the sellers of water could form a cartel, they would once again try to maximize total profit by producing the monopoly quantity and charging the monopoly price. Just as when there were only two sellers, the members of the cartel would need to agree on production levels for each member and find some way to enforce the agreement. As the cartel grows larger, however, this outcome is less likely. Reaching and enforcing an agreement becomes more difficult as the size of the group increases. If the oligopolists do not form a cartel perhaps because competition laws prohibit it they must each decide on their own how much water to produce. To see how the increase in the number of sellers affects the outcome, consider the decision facing each seller. At any time, each well owner has the option to raise production by 1 litre. In making this decision, the well owner weighs two effects: The output effect. Because price is above marginal cost, selling 1 more litre of water at the going price will raise profit. The price effect. Raising production will increase the total amount sold, which will lower the price of water and lower the profit on all the other litres sold. If the output effect is larger than the price effect, the well owner will increase production. If the price effect is larger than the output effect, the owner will not raise production. (In fact, in this case, it is profitable to reduce production.) Each oligopolist continues to increase production until these two marginal effects exactly balance, taking the other firms production as given. Now consider how the number of firms in the industry affects the marginal analysis of each oligopolist. The larger the number of sellers, the less concerned each seller is about its own impact on the market price. That is, as the oligopoly grows in size, the magnitude of the price effect falls. When the oligopoly grows very large, the price effect disappears altogether, leaving only the output effect. In this extreme case, each firm in the oligopoly increases production as long as price is above marginal cost. We can now see that a large oligopoly is essentially a group of competitive firms. A competitive firm considers only the output effect when deciding how much to produce: because a competitive firm is a price taker, the price effect is absent. Thus, as the number of sellers in an oligopoly grows larger, an oligopolistic market looks more and more like a competitive market. The price approaches marginal cost, and the quantity produced approaches the socially efficient level. Pitfall Prevention Remember that in an oligopolistic market structure there can be many hundreds, and in some cases, thousands of firms but the crucial thing to remember is that the market is dominated by a small number of very large firms. This analysis of oligopoly offers a new perspective on the effects of international trade. Imagine that Toyota and Honda are the only car manufacturers in Japan, Volkswagen and BMW are the only car manufacturers in Germany, and Citroën and Peugeot are the only car manufacturers in France. If these nations prohibited international trade in cars, each would have a motorcar oligopoly with only two members, and the market outcome would likely depart substantially from the competitive ideal. With international trade, however, the car market is a world market, and the oligopoly in this example has six members. Allowing free trade increases the number of producers from whom each consumer can

14 314 Part 4 Microeconomics The Economics of Firms in Markets choose, and this increased competition keeps prices closer to marginal cost. Thus, the theory of oligopoly provides another reason why all countries can benefit from free trade. Quick Quiz If the members of an oligopoly could agree on a total quantity to produce, what quantity would they choose? If the oligopolists do not act together but instead make production decisions individually, do they produce a total quantity more or less than in your answer to the previous question? Why? GAME THEORY AND THE ECONOMICS OF COMPETITION game theory the study of how people behave in strategic situations prisoners dilemma a particular game between two captured prisoners that illustrates why cooperation is difficult to maintain even when it is mutually beneficial As we have seen, oligopolies would like to reach the monopoly outcome, but doing so requires cooperation, which at times is difficult to maintain. In this section we look more closely at the problems people face when cooperation is desirable but difficult. To analyze the economics of cooperation, we need to learn a little about game theory. Game theory is the study of how people behave in strategic situations. By strategic we mean a situation in which each person, when deciding what actions to take, must consider how others might respond to that action. Because the number of firms in an oligopolistic market is small, each firm must act strategically. Each firm knows that its profit depends not only on how much it produces but also on how much the other firms produce. In making its production decision, each firm in an oligopoly should consider how its decision might affect the production decisions of all the other firms. Game theory is quite useful for understanding the behaviour of oligopolies. A particularly important game is called the prisoners dilemma. This game provides insight into the difficulty of maintaining cooperation. Many times in life, people fail to cooperate with one another even when cooperation would make them all better off. An oligopoly is just one example. The story of the prisoners dilemma contains a general lesson that applies to any group trying to maintain cooperation among its members. The Prisoners Dilemma The prisoners dilemma is a story about two criminals who have been captured by the police. Let s call them Mr Green and Mr Blue. The police have enough evidence to convict Mr Green and Mr Blue of a relatively minor crime, possessing stolen property, so that each would spend a year in jail. The police also suspect that the two criminals have committed an armed jewellery robbery together, but they lack hard evidence to convict them of this major crime. The police question Mr Green and Mr Blue in separate rooms, and they offer each of them the following deal: Right now we can lock you up for 1 year. If you confess to the jewellery robbery and implicate your partner, however, we ll give you immunity and you can go free. Your partner will get 20 years in jail. But if you both confess to the crime, we won t need your testimony and we can avoid the cost of a trial, so you will each get an intermediate sentence of 8 years. If Mr Green and Mr Blue, heartless criminals that they are, care only about their own sentences, what would you expect them to do? Would they confess or remain silent? Figure 13.4 shows their choices. Each prisoner has two strategies: confess or remain silent. The sentence each prisoner gets depends on the strategy he chooses and the strategy chosen by his partner in crime.

15 Chapter 13 Other Types of Imperfect Competition 315 FIGURE 13.4 The Prisoners Dilemma In this game between two criminals suspected of committing a crime, the sentence that each receives depends both on his decision whether to confess or remain silent and on the decision made by the other. Mr Green s decision Confess Mr Green gets 8 years Remain silent Mr Green gets 20 years Confess Mr Blue s decision Mr Blue gets 8 years Mr Green goes free Mr Blue goes free Mr Green gets 1 year Remain silent Mr Blue gets 20 years Mr Blue gets 1 year Consider first Mr Green s decision. He reasons as follows: I don t know what Mr Blue is going to do. If he remains silent, my best strategy is to confess, since then I ll go free rather than spending a year in jail. If he confesses, my best strategy is still to confess, since then I ll spend 8 years in jail rather than 20. So, regardless of what Mr Blue does, I am better off confessing. In the language of game theory, a strategy is called a dominant strategy if it is the best strategy for a player to follow regardless of the strategies pursued by other players. In this case, confessing is a dominant strategy for Mr Green. He spends less time in jail if he confesses, regardless of whether Mr Blue confesses or remains silent. Now consider Mr Blue s decision. He faces exactly the same choices as Mr Green, and he reasons in much the same way. Regardless of what Mr Green does, Mr Blue can reduce his time in jail by confessing. In other words, confessing is also a dominant strategy for Mr Blue. In the end, both Mr Green and Mr Blue confess, and both spend 8 years in jail. Yet, from their standpoint, this is a terrible outcome. If they had both remained silent, both of them would have been better off, spending only 1 year in jail on the possession charge. By each pursuing his own interests, the two prisoners together reach an outcome that is worse for each of them. To see how difficult it is to maintain cooperation, imagine that, before the police captured Mr Green and Mr Blue, the two criminals had made a pact not to confess. Clearly, this agreement would make them both better off if they both live up to it, because they would each spend only 1 year in jail. But would the two criminals in fact remain silent, simply because they had agreed to? Once they are being questioned separately, the logic of self-interest takes over and leads them to confess. Cooperation between the two prisoners is difficult to maintain, because cooperation is individually irrational. dominant strategy a strategy that is best for a player in a game regardless of the strategies chosen by the other players Oligopolies as a Prisoner s Dilemma What does the prisoners dilemma have to do with markets and imperfect competition? It turns out that the game oligopolists play in trying to reach the monopoly outcome is similar to the game that the two prisoners play in the prisoners dilemma.

16 316 Part 4 Microeconomics The Economics of Firms in Markets FIGURE 13.5 An Oligopoly Game In this game between members of an oligopoly, the profit that each earns depends on both its production decision and the production decision of the other oligopolist. BP s decision High production BP gets $4 billion Low production BP gets $3 billion High production Shell s decision Shell gets $4 billion BP gets $6 billion Shell gets $6 billion BP gets $5 billion Low production Shell gets $3 billion Shell gets $5 billion Consider an oligopoly with two firms, BP and Shell. Both firms refine crude oil. After prolonged negotiation, the two firms agree to keep refined oil production low in order to keep the world price of refined oil high. After they agree on production levels, each firm must decide whether to cooperate and live up to this agreement or to ignore it and produce at a higher level. Figure 13.5 shows how the profits of the two firms depend on the strategies they choose. Suppose you are the CEO of BP. You might reason as follows: I could keep production low as we agreed, or I could raise my production and sell more refined oil on world markets. If Shell lives up to the agreement and keeps its production low, then my firm earns profit of $6 billion with high production and $5 billion with low production. In this case, BP is better off with high production. If Shell fails to live up to the agreement and produces at a high level, then my firm earns $4 billion with high production and $3 billion with low production. Once again, BP is better off with high production. So, regardless of what Shell chooses to do, my firm is better off reneging on our agreement and producing at a high level. Producing at a high level is a dominant strategy for BP. Of course, Shell reasons in exactly the same way, and so both countries produce at a high level. The result is the inferior outcome (from BP and Shell s standpoint) with low profits for each firm. This example illustrates why oligopolies have trouble maintaining monopoly profits. The monopoly outcome is jointly rational for the oligopoly, but each oligopolist has an incentive to cheat. Just as self-interest drives the prisoners in the prisoners dilemma to confess, self-interest makes it difficult for the oligopoly to maintain the cooperative outcome with low production, high prices and monopoly profits. Other Examples of the Prisoners Dilemma We have seen how the prisoners dilemma can be used to understand the problem facing oligopolies. The same logic applies to many other situations as well. Here we consider two examples in which self-interest prevents cooperation and leads to an inferior outcome for the parties involved.

17 Chapter 13 Other Types of Imperfect Competition 317 P.J CURRIER/MEDIA SELECT INTERNATIONAL Advertising When two firms advertise to attract the same customers, they face a problem similar to the prisoners dilemma. For example, consider the decisions facing two cigarette companies, Marlboro and Camel. If neither company advertises, the two companies split the market. If both advertise, they again split the market, but profits are lower, since each company must bear the cost of advertising. Yet if one company advertises while the other does not, the one that advertises attracts customers from the other. Figure 13.6 shows how the profits of the two companies depend on their actions. You can see that advertising is a dominant strategy for each firm. Thus, both firms choose to advertise, even though both firms would be better off if neither firm advertised. A test of this theory of advertising occurred in many countries during the 1970s and 1980s, when laws were passed in Europe and North America banning cigarette advertisements on television. To the surprise of many observers, cigarette companies did not use their political influence to oppose these bans. When the laws went into effect, cigarette advertising fell and the profits of cigarette companies rose. The television advertising bans did for the cigarette companies what they could not do on their own: they solved the prisoners dilemma by enforcing the cooperative outcome with low advertising and high profit. Common Resources Common resources tend to be subject to overuse because they are rival in consumption but not excludable, for example, fish in the sea. One can view this problem as an example of the prisoners dilemma. Imagine that two mining companies Kazakhmys and Vedanta own adjacent copper mines. The mines have a common pool of copper worth 12 million. Drilling a shaft

18 318 Part 4 Microeconomics The Economics of Firms in Markets FIGURE 13.6 An Advertising Game In this game between firms selling similar products, the profit that each earns depends on both its own advertising decision and the advertising decision of the other firm. Marlboro s decision Advertise Marlboro gets 3 billion profit Don t advertise Marlboro gets 2 billion profit Advertise Camel s decision Don t advertise Camel gets 3 billion profit Camel gets 2 billion profit Marlboro gets 5 billion profit Camel gets 5 billion profit Marlboro gets 4 billion profit Camel gets 4 billion profit to mine the copper costs 1 million. If each company drills one shaft, each will get half of the copper and earn a 5 million profit ( 6 million in revenue minus 1 million in costs). Because the pool of copper is a common resource, the companies will not use it efficiently. Suppose that either company could drill a second shaft. If one company has two of the three shafts, that company gets two-thirds of the copper, which yields a profit of 6 million. The other company gets one-third of the copper, for a profit of 3 million. Yet if each company drills a second shaft, the two companies again split the copper. In this case, each bears the cost of a second shaft, so profit is only 4 million for each company. Figure 13.7 shows the game. Drilling two wells is a dominant strategy for each company. Once again, the self-interest of the two players leads them to an inferior outcome. FIGURE 13.7 A Common Resources Game In this game between firms mining copper from a common pool, the profit that each earns depends on both the number of shafts it drills and the number of shafts drilled by the other firm. Vedanta s decision Drill two shafts Vedanta gets 4 million profit Drill one shaft Vedanta gets 3 million profit Drill two shafts Kazakhmy s decision Kazakhmys gets 4 million profit Vedanta gets 6 million profit Kazakhmys gets 6 million profit Vedanta gets 5 million profit Drill one shaft Kazakhmys gets 3 million profit Kazakhmys gets 5 million profit

19 Chapter 13 Other Types of Imperfect Competition 319 Why Firms Sometimes Cooperate The prisoners dilemma shows that cooperation is difficult. But is it impossible? Not all prisoners, when questioned by the police, decide to turn in their partners in crime. Cartels sometimes do manage to maintain collusive arrangements, despite the incentive for individual members to defect. Very often, the reason that players can solve the prisoners dilemma is that they play the game not once but many times. To see why cooperation is easier to enforce in repeated games, let s return to our duopolists, Ishaq and Coralie. Recall that Ishaq and Coralie would like to maintain the monopoly outcome in which each produces 30 litres, but self-interest drives them to an equilibrium in which each produces 40 litres. Figure 13.8 shows the game they play. Producing 40 litres is a dominant strategy for each player in this game. Imagine that Ishaq and Coralie try to form a cartel. To maximize total profit they would agree to the cooperative outcome in which each produces 30 litres. Yet, if Ishaq and Coralie are to play this game only once, neither has any incentive to live up to this agreement. Self-interest drives each of them to renege and produce 40 litres. Now suppose that Ishaq and Coralie know that they will play the same game every week. When they make their initial agreement to keep production low, they can also specify what happens if one party reneges. They might agree, for instance, that once one of them reneges and produces 40 litres, both of them will produce 40 litres forever after. This penalty is easy to enforce, for if one party is producing at a high level, the other has every reason to do the same. The threat of this penalty may be all that is needed to maintain cooperation. Each person knows that defecting would raise his or her profit from 1800 to But this benefit would last for only one week. Thereafter, profit would fall to 1600 and stay there. As long as the players care enough about future profits, they will choose to forgo the one-time gain from defection. Thus, in a game of repeated prisoners dilemma, the two players may well be able to reach the cooperative outcome. Quick Quiz Tell the story of the prisoners dilemma. Write down a table showing the prisoners choices and explain what outcome is likely. What does the prisoners dilemma teach us about oligopolies? FIGURE 13.8 Ishaq and Coralie s Oligopoly Game In this game between Ishaq and Coralie, the profit that each earns from selling water depends on both the quantity he or she chooses to sell and the quantity the other chooses to sell. Ishaq s decision Sell 40 litres Ishaq gets 1600 profit Sell 30 litres Ishaq gets 1500 profit Sell 40 litres Coralie s decision Coralie gets 1600 profit Ishaq gets 2000 profit Coralie gets 2000 profit Ishaq gets 1800 profit Sell 30 litres Coralie gets 1500 profit Coralie gets 1800 profit

20 320 Part 4 Microeconomics The Economics of Firms in Markets Models of Oligopoly residual demand the difference between the market demand curve and the amount supplied by other firms in the market Earlier we noted that firms are interdependent. Most firms will have a reasonable idea of the size of the market in which they operate and what position they hold in that market. Let us assume a duopoly again to illustrate how firms might behave. Assume that Firm A has conducted research and that the size of the market it operates in is 1 million units or a value of 1 million a year. We will also assume that the marginal cost is constant. Figure 13.9 illustrates this situation. If Firm A were the only producer in the market it would produce where the MR curve cuts the MC curve and supply the whole 1 million units at Q 1. However, Firm A knows that Firm B also operates in the market and supplies 20 per cent of the market. The demand curve it faces is thus not D 1 but D 2 which is referred to as a residual demand curve. D 2 has an associated marginal revenue curve MR 2. Firm A s profit-maximizing output is now Q 2 where MR 2 cuts the MC curve. Residual demand is defined as the difference between the market demand curve and the amount supplied by other firms in the market. The residual demand curve depends on the output decision of the other firms in the market. Firm A might expend some time and effort trying to find out or at the very least estimate what this output level might be. In other words, Firm A needs to have some idea of the residual demand curve it faces or risk producing an output which would drive down the market price it faced. If, for example, it produced 1 million units and Firm B produced units then there would be excess supply and the price it faces would fall. Knowing what your rival is planning to do is important in adopting the right strategy to ensure profit-maximizing output. If Firm B supplied 40 per cent of the market then Firm A would face a different residual demand curve D 3 and would set output at Q 3 where MR 3 cuts the MC curve. It would be possible to conceptualize a situation where Firm A could map all possible outputs by Firm B and thus how it would react to these output levels. FIGURE 13.9 Residual Demand If Firm A supplied the whole market (i.e. it assumes Firm B produces nothing) then the profit-maximizing output would be Q 1. If Firm A assumes Firm B produces 20 per cent of the market (shown by demand curve D 2 ) then its new profit-maximizing output will be Q 2 where the MR curve associated with the residual demand curve D 2. If Firm B was assumed to produce 40 per cent of the market output then Firm A would produce where MR 3 associated with residual demand D 3 cuts the MC curve at output Q 3. Price MC Q 3 MR 3 D 2 MR 2 D 2 MR D 1 Q 2 Q 1 Quantity

21 Chapter 13 Other Types of Imperfect Competition 321 The result of this analysis by Firm A would give it its reaction function. The reaction function outlines the profit-maximizing output for a firm given the simultaneous output decisions of its rivals. Firm B will also have a reaction function derived from its analysis of how it would react to the output decisions of Firm A. The respective reaction functions show how Firm A would react if Firm B changed its output decisions and vice versa. This model of oligopoly was developed by Augustin Cournot in Cournot assumed that given two firms in a duopoly, each firm determines its profit-maximizing output on the assumption of the output of the other firm and that the decision of the other firm will not change in a given time period. In a given time period, therefore, Firm A, for example, could alter its output decision and its rival would not react. However, Firm B makes its decision under the same assumptions. This simultaneous decision making whereby each firm is trying to increase its profits but assuming its rivals will not react over different time periods eventually leads to an equilibrium position. We can represent this equilibrium in Figure Firm A s output is on the vertical axis and Firm B s output on the horizontal axis. If Firm A assumed Firm B would produce zero then it would supply the whole market and the vertical intercept would be given by point C 1. If Firm B produced all the market output then Firm A would produce nothing indicated by point C 2. All other points in between show combinations of output for Firm A given a corresponding output decision by Firm B. The red line is Firm A s reaction function. Equally we can graph Firm B s reaction function which will be the symmetrical opposite of Firm A s. If Firm A produces all the market output Firm B will produce nothing (point T 1 ) and if Firm A produced nothing Firm B would produce all the market output (point T 2 ). Connecting these points gives Firm B s reaction function indicated by the blue line. reaction function the profitmaximizing output for a firm given the simultaneous output decisions of its rivals FIGURE Reaction Functions The reaction functions given by the red and blue lines show combinations of output produced by Firm A and Firm B respectively given simultaneous decisions on output. If Firm A assumed Firm B will produce all the output in the market it produces zero shown by the horizontal intercept C 1. If Firm B produced nothing, Firm A will act as a monopolist and produce all the output shown by the vertical intercept C 2. The points in between show the various combinations of output Firm A would produce given Firm B s reaction and give Firm A s reaction function shown by the red line. Equally, if Firm A produced nothing, Firm B would act as the monopolist and produce all the output shown by the horizontal intercept T 1. If Firm A produced all the output Firm B would produce nothing shown by the vertical intercept T 2. The points in between give Firm B s reaction function shown by the blue line. If either firm produced off its reaction function at different time periods there would be an incentive for the other to change its output in subsequent time periods until equilibrium was reached at Q 1,Q 2. This represents a Nash equilibrium because both firms make optimum decisions based on what its rivals are doing and a change in strategy by either firm would result in a less than optimum outcome. Output Firm A C 2 T 2 Nash equilibrium Q 1 Q 2 C 1 T 1 Output Firm B

22 322 Part 4 Microeconomics The Economics of Firms in Markets The point where the two reaction functions cross is a Nash equilibrium. At this point neither firm has any incentive to change its output both firms maximize profit given its own decision and the decision of its rival. An alternative model is the Bertrand model. In this model firms assume that the price fixed by its rivals is given. If Firm B, for example, sets price, Firm A will select a price and output level which maximizes this profit. Assume that Firm B sets a price which is above MC. Firm A has the incentive to set its price slightly below that of Firm B and capture market share. In such a situation how would Firm B react? It would react by cutting its price. In turn Firm A would cut its price and the process will continue until P = MC and there is no incentive for either to change. What the Bertrand model predicts, therefore, is that the equilibrium in an oligopoly will give an outcome the same as that in perfect competition with P = MC. In such a situation each firm will be making its own pricing decision based on its own optimal outcome given the optimal behaviour of its rivals. Once again, this is a Nash equilibrium. In reality, of course, firms do not make simultaneous decisions and game theory tells us that a firm will look to make decisions based on what it thinks its rivals will do in response and that it will learn from repeated instances of this game. The Stackelberg model takes these new assumptions into account. This model looks at what equilibrium output would be for the two firms if one firm was the leader taking decisions first but considering what the other firm would do in response. If Firm A announces that it is going to produce output Q 1, it has to think about what Firm B will do in response. Firm A will have to consider a range of outputs and the response of Firm B to determine what its optimal output and profit level will be. The Stackelberg model describes the advantages a firm can gain through moving before that of its rivals so called first mover advantage. If Firm A is the leader and Firm B the follower then there may be an advantage to A in making a move to change output having estimated the response by Firm B. What is crucial in this model is that the decision made by Firm A is seen as being serious and credible by Firm B. Assume that Firm A sets its output level at Q 1, and thus is the first mover. Firm B, the follower, will observe this and make its output decision based on Firm A s decision. Firm A knows this and so will have to take into consideration what Firm B s reaction is going to be. It is in Firm A s interest to set output at a higher level to generate more profits but Firm B must also be sure that this is what Firm A is going to do, hence the importance of Firm A s announcement being serious and credible. If Firm A announces that it intends to build a new plant and production facility to enable it to produce 70 per cent of the market output then Firm B must set its output to produce 30 per cent. If Firm B knows that Firm A is serious (and the investment announcement is an indicator of this) then if it produced any more that 30 per cent of the market output price would be driven down due to excess supply and it would be worse off as a result. In addition, moving first in the market could mean that Firm A is able to exploit the profits that accrue from its investment first and use these profits to reinvest in expanding the firm further in the future. The risk for Firm A is that in making the move first it might experience considerable costs in so doing costs which Firm B will also have to pay but possibly at lower levels because it can learn from the mistakes of the first mover. PUBLIC POLICIES TOWARD OLIGOPOLIES Cooperation among oligopolists is undesirable from the standpoint of society as a whole, because it leads to production that is too low and prices that are too high. To move the allocation of resources closer to the social optimum, policy makers try to induce firms in an oligopoly to compete rather than cooperate. Let s consider how policy makers do this and then examine the controversies that arise in this area of public policy.

23 Chapter 13 Other Types of Imperfect Competition 323 Restraint of Trade and Competition Law One way that policy discourages cooperation is through the common law. Normally, freedom of contract is an essential part of a market economy. Businesses and households use contracts to arrange mutually advantageous trades. In doing this, they rely on the court system to enforce contracts. Yet, for many centuries, courts in Europe and North America have deemed agreements among competitors to reduce quantities and raise prices to be contrary to the public interest. They have therefore refused to enforce such agreements. Given the long experience of many European countries in tackling abuses of market power, it is perhaps not surprising that competition law is one of the few areas in which the European Union has been able to agree on a common policy. The European Commission can refer directly to the Treaty of Rome to prohibit price-fixing and other restrictive practices such as production limitation, and is especially likely to do so where a restrictive practice affects trade between EU member countries. The EU Competition Commission sets out its role as follows: The antitrust area covers two prohibition rules set out in the Treaty on the Functioning of the European Union. First, agreements between two or more firms which restrict competition are prohibited by Article 101 of the Treaty, subject to some limited exceptions. This provision covers a wide variety of behaviours. The most obvious example of illegal conduct infringing [the Article] is a cartel between competitors (which may involve pricefixing or market sharing). Second, firms in a dominant position may not abuse that position (Article 102 of the Treaty). This is for example the case for predatory pricing aiming at eliminating competitors from the market. The Commission is empowered by the Treaty to apply these prohibition rules and enjoys a number of investigative powers to that end (e.g. inspection in business and non-business premises, written requests for information, etc). It may also impose fines on undertakings which violate EU antitrust rules. Since 1 May 2004, all national competition authorities are also empowered to apply fully the provisions of the Treaty in order to ensure that competition is not distorted or restricted. National courts may also apply these prohibitions so as to protect the individual rights conferred to citizens by the Treaty. (Source: Controversies Over Competition Policy Over time, much controversy has centred on the question of what kinds of behaviour competition law should prohibit. Most commentators agree that price-fixing agreements among competing firms should be illegal. Yet competition law has been used to condemn some business practices whose effects are not obvious. Here we consider three examples. Resale Price Maintenance One example of a controversial business practice is resale price maintenance, also called fair trade. Imagine that Superduper Electronics sells DVD players to retail stores for 300. If Superduper requires the retailers to charge customers 350, it is said to engage in resale price maintenance. Any retailer that charged less than 350 would have violated its contract with Superduper. At first, resale price maintenance might seem anti-competitive and, therefore, detrimental to society. Like an agreement among members of a cartel, it prevents the retailers from competing on price. For this reason, the courts have often viewed resale price maintenance as a violation of competition law. Yet some economists defend resale price maintenance on two grounds. First, they deny that it is aimed at reducing competition. To the extent that Superduper Electronics has any market power, it can exert that power through the wholesale price, rather than

24 324 Part 4 Microeconomics The Economics of Firms in Markets through resale price maintenance. Moreover, Superduper has no incentive to discourage competition among its retailers. Indeed, because a cartel of retailers sells less than a group of competitive retailers, Superduper would be worse off if its retailers were a cartel. Secondly, economists believe that resale price maintenance has a legitimate goal. Superduper may want its retailers to provide customers with a pleasant showroom and a knowledgeable salesforce. Yet, without resale price maintenance, some customers would take advantage of one store s service to learn about the DVD player s special features and then buy the item at a discount retailer that does not provide this service. To some extent, good service is a public good among the retailers that sell Superduper products. As we saw in Chapter 8, when one person provides a public good, others are able to enjoy it without paying for it. In this case, discount retailers would free ride on the service provided by other retailers, leading to less service than is desirable. Resale price maintenance is one way for Superduper to solve this free-rider problem. The example of resale price maintenance illustrates an important principle: business practices that appear to reduce competition may in fact have legitimate purposes. This principle makes the application of competition law all the more difficult. The competition authorities in each EU nation under the European Competition Network are in charge of enforcing these laws and must determine what kinds of behaviour public policy should prohibit as impeding competition and reducing economic well-being. Often that job is not easy. Predatory Pricing Firms with market power normally use that power to raise prices above the competitive level. But should policy makers ever be concerned that firms with market power might charge prices that are too low? This question is at the heart of a second debate over competition policy. Imagine that a large airline, call it National Airlines, has a monopoly on some route. Then Fly Express enters and takes 20 per cent of the market, leaving National with 80 per cent. In response to this competition, National starts slashing its fares. Some antitrust analysts argue that National s move could be anti-competitive: the price cuts may be intended to drive Fly out of the market so National can recapture its monopoly and raise prices again. Such behaviour is called predatory pricing. Although it is common for companies to complain to the relevant authorities that a competitor is pursuing predatory pricing, some economists are sceptical of this argument and believe that predatory pricing is rarely, and perhaps never, a profitable business strategy. Why? For a price war to drive out a rival, prices have to be driven below cost. Yet if National starts selling cheap tickets at a loss, it had better be ready to fly more planes, because low fares will attract more customers. Fly Express, meanwhile, can respond to National s predatory move by cutting back on flights. As a result, National ends up bearing more than 80 per cent of the losses, putting Fly Express in a good position to survive the price war. In such cases, the predator can suffer more than the prey. Economists continue to debate whether predatory pricing should be a concern for competition policy makers. Various questions remain unresolved. Is predatory pricing ever a profitable business strategy? If so, when? Are the authorities capable of telling which price cuts are competitive and thus good for consumers and which are predatory? There are no simple answers. Tying A third example of a controversial business practice is tying. Suppose that Makemoney Movies produces two new films Spiderman and Hamlet. If Makemoney offers cinemas the two films together at a single price, rather than separately, the studio is said to be tying its two products. Some economists have argued that the practice of tying should be banned. Their reasoning is as follows: imagine that Spiderman is a blockbuster, whereas Hamlet is an unprofitable art film. Then the studio could use the high demand for Spiderman to force cinemas to buy Hamlet. It seemed that the studio could use tying as a mechanism for expanding its market power.

25 Chapter 13 Other Types of Imperfect Competition 325 Other economists are sceptical of this argument. Imagine that cinemas are willing to pay for Spiderman and nothing for Hamlet. Then the most that a cinema would pay for the two films together is the same as it would pay for Spiderman by itself. Forcing the cinema to accept a worthless film as part of the deal does not increase the cinema s willingness to pay. Makemoney cannot increase its market power simply by bundling the two films together. Why, then, does tying exist? One possibility is that it is a form of price discrimination. Suppose there are two cinemas. City Cinema is willing to pay for Spiderman and 5000 for Hamlet. Country Cinema is just the opposite: it is willing to pay 5000 for Spiderman and for Hamlet. If Makemoney charges separate prices for the two films, its best strategy is to charge for each film, and each cinema chooses to show only one film. Yet if Makemoney offers the two films as a bundle, it can charge each cinema for the films. Thus, if different cinemas value the films differently, tying may allow the studio to increase profit by charging a combined price closer to the buyers total willingness to pay. Tying remains a controversial business practice. We saw in Chapter 12 how Microsoft had been investigated for tying its internet browser and other software like its Windows Media Player with its Windows operating system and the arguments that the company had put forward in its defence. The argument that tying allows a firm to extend its market power to other goods is not well founded, at least in its simplest form. Yet economists have proposed more elaborate theories for how tying can impede competition. Given our current economic knowledge, it is unclear whether tying has adverse effects for society as a whole. All the analysis is based on an assumption that rivals may have sufficient information to be able to make a decision and that the decision will be a rational one based on this information. In reality firms do not have perfect information and do not behave rationally. Most firms in oligopolistic markets work very hard to protect sensitive information and only give out what they have to by law. Some information may be given to deliberately obfuscate the situation and hide what their true motives/strategies/tactics are. Economists have tried to include these imperfections into theories. Behavioural economics has become more popular in recent years because it offers some greater insights into the observed behaviour of the real world which often does not conform to the assumptions implied by the assumption of rationality. Quick Quiz What kind of agreement is illegal for businesses to make? Why is competition law controversial? CONCLUSION Oligopolies would like to act like monopolies, but self-interest drives them closer to competition. Thus, oligopolies can end up looking either more like monopolies or more like competitive markets, depending on the number of firms in the oligopoly and how cooperative the firms are. The story of the prisoners dilemma shows why oligopolies can fail to maintain cooperation, even when cooperation is in their best interest. Policy makers regulate the behaviour of oligopolists through competition law. The proper scope of these laws is the subject of ongoing controversy. Although price fixing among competing firms clearly reduces economic welfare and should be illegal, some business practices that appear to reduce competition may have legitimate if subtle purposes. As a result, policy makers need to be careful when they use the substantial powers of competition law to place limits on firm behaviour.

26 326 Part 4 Microeconomics The Economics of Firms in Markets IN THE NEWS Anti-Competitive Behaviour One aspect of anti-trust or anti-competitive behaviour is price-fixing where a group of firms act together to set prices at a level which is above the market clearing price. The cement industry in a number of countries has been subject to investigation by competition authorities and in this article, the industry in Egypt has come under scrutiny. Accusations of Price Fixing in Egypt s Cement Sector The Egyptian Competition Authority (ECA) referred 11 cement companies essentially every major producer in the sector to the public prosecutor last month (October 2007). All the 11 companies were accused of violating antitrust laws after a 14-month investigation into the sector. The final report of the investigation alleged widespread anticompetitive practices, particularly related to price fixing efforts in the local market. Allegations of price fixing in the cement industry have been made across the world not just in Egypt. In statements following the announcement, Minister of Trade and Industry Rachid Mohamed Rachid said that competing in a free market involves complying with laws and regulations, and that such laws exist to ensure that all competitors play on an even field. The minister stressed that antitrust investigations by the ECA (also known by its official title of the Authority for the Protection of Competition and the Prohibition of Monopolistic Practices) will TAWFIK DAJANI/SHUTTERSTOCK not be exclusive to the steel and cement sectors. Samiha Fawzy, an assistant to the minister, said that fines will start at LE and could go up to a crippling LE 10 million, and that Rachid only decided to act when it was demonstrated that the companies were making profits from illegal collusion. Reactions from cement sector leaders were predictably hostile. Abdel Meguid Mahmoud, an exporter and investor in the sector, confirmed that there was a verbal agreement between cement companies to raise prices from US$58 to US$75 per ton, noting that production was set to increase from the current 35 million tons to 49 million tons in Mahmoud justified such an agreement based on the fact that cement demand is not flexible, and that any shortage in supply will cause direct price hikes. According to Mahmoud, by informally agreeing to a price target, producers were attempting to keep demand and prices in check. Medhat Stefano, commercial head of the Egyptian arm of France-based global cement company Lafarge, told local reporters that the decision will negatively impact the investment environment, and that there may have been political influence on the court s final decision. In support of the charges, Ahmed El- Zieny, deputy of the construction material division in the Chamber of Trade, said that several cement companies tried to pressure the minister not to go ahead with the charges, attributing recent price rises to increasing transportation costs. Hassan Rateb, head of the Building Material Exporting Board and head of Sinai Cement Group, said that free market mechanisms must be respected and followed, but he criticized Rachid for indicting the entire sector, including state-owned companies, saying that the move will give the impression that the state can t control the actions of its own companies. Rateb defended the sector, claiming that given export market prices are significantly higher than local ones, there is little incentive to game the domestic market. Accusations of price fixing in the construction materials sector have been made in countries throughout the world in recent years, after a 20-year wave of consolidation left the industry dominated by a small group of large global players. In 2003, the German Federal Cartel Office (a national competition watchdog) levied almost US$650 million in antitrust fines against the country s leading cement producers. Bertrand Collomb, then CEO of Lafarge, later acknowledged that his company had engaged in unacceptable practices inthegermanmarket. Antitrust investigations into the cement sector, most ending in charges being made, have recently taken place in France, Poland, Argentina, Hungary, Ukraine, Romania and Taiwan. Richard Whish, an expert on cartels and Professor of Law at Kings College,