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Chapter 26
1.
Chapter 26 Oligopoly and Strategic Behavior
2.
Introduction Three textbook publishers
together account for more than four-fifths of all U.S. textbook sales. The production and pricing decisions of any one of these three firms influence decisions made by the other two competitors. The textbook industry is therefore an example of oligopoly, a market structure in which there is only a handful of competitors. Chapter 26 will teach you the economic theory of oligopoly. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-2
3.
Learning Objectives • Outline
the fundamental characteristics of oligopoly • Understand how to apply game theory to evaluate the pricing strategies of oligopolistic firms • Identify features of an industry that help or hinder efforts to form a cartel that seeks to restrain output and earn economic profits • Illustrate how network effects and market feedback can explain why some industries are oligopolies • Explain why multiproduct firms selling complimentary sets of products may or may not want their products to be compatible with those of their competitors Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-3
4.
Chapter Outline Oligopoly Strategic Behavior
and Game Theory The Cooperative Game: A Collusive Cartel Network Effects Product Compatibility In Multiproduct Oligopolies Facing Network Effects • Comparing Market Structures • • • • • Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-4
5.
Did You Know
That ... • Since 2009, there has been an increase in the percentage of web-surfing time devoted to Facebook? • As the time spent on Facebook has increased from 3 percent to 15 percent, there have been declines in the portion of web-surfing time devoted to AOL, eBay, MySpace, and Yahoo. • Most economists agree that a fundamental key to Facebook’s growth has been that the benefit a person receives from time on Facebook increases with the number of people who use the site. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-5
6.
Oligopoly • An important
market structure that we have yet to discuss involves a situation in which a few large firms comprise an entire industry • They are not perfectly competitive, nor even monopolistically competitive, and because there are several of them a pure monopoly doesn’t exist Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-6
7.
Oligopoly (cont'd) • Oligopoly –
A market situation in which there are very few sellers – Each seller knows that the other sellers will react to its changes in prices and quantities Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-7
8.
Oligopoly (cont'd) • Characteristics
of oligopoly – Small number of firms – Interdependence • Strategic dependence Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-8
9.
Oligopoly (cont'd) • Strategic
Dependence – A situation in which one firm’s actions with respect to price, quality, advertising, and related changes may be strategically countered by the reactions of one or more other firms in the industry – Such dependence can exist only when there are a limited number of firms in an industry Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-9
10.
Oligopoly (cont'd) • Why
oligopoly occurs – Economies of scale – Barriers to entry – Mergers • Vertical mergers • Horizontal mergers Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-10
11.
Oligopoly (cont'd) • Vertical
Merger – The joining of a firm with another to which it sells an output or from which it buys an input • Horizontal Merger – The joining of firms that are producing or selling a similar product Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-11
12.
What If .
. . The government promoted competition among more firms by prohibiting horizontal mergers? • Sometimes media observers suggest that a prohibition on horizontal mergers would make markets more competitive. • But as was demonstrated in Chapter 22, firms operate at lowest long-run average cost when they are able to attain their minimum efficient scale. • If the government were to prevent horizontal mergers, many firms would end up operating below minimum efficient scale. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-12
13.
Oligopoly (cont'd) • Measuring
industry concentration – Concentration Ratio • The percentage of all sales contributed by the leading four or leading eight firms in an industry • Sometimes called the industry concentration ratio Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-13
14.
Table 26-1 Computing
the Four-Firm Concentration Ratio Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-14
15.
Table 26-2 Four-Firm
Domestic Concentration Ratios for Selected U.S. Industries Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-15
16.
Example: The Four-Firm
Concentration Ratio in the U.S. Auto Industry • In a recent year, the bulk of U.S. auto sales were accounted for by these seven firms: – – – – – – – General Motors (19.1 percent) Ford (16.5 percent) Toyota (15.3 percent) Honda (10.6 percent) Chrysler (9.3 percent) Nissan (7.9 percent) Hyundai (7.7 percent) • The four-firm concentration ratio for the U.S. auto industry was therefore 61.5 percent. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-16
17.
Oligopoly (cont'd) • The
Herfindahl-Hirschman Index – The Herfindahl-Hirschman Index (HHI) is equal to the sum of the squared sales shares of all firms in the industry – Table 26-3 shows that concentration ratios can fail to reflect potentially considerable variations in the distribution of firm sizes within industries Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-17
18.
Table 26-3 Dollar
Sales and Percentage Sales Shares for Two Industries Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-18
19.
Oligopoly (cont'd) • For
Industry A in Table 26-3, the HHI is approximately 6,719.2 • For Industry B, the HHI is about 2,500 • This substantial difference in HHI levels reflects the fact that the distribution of firm sizes is more even in Industry B than in Industry A Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-19
20.
International Example: The
HHI for the Global Internet Browser Industry • Recently the worldwide percentage shares of sales for the five Internet browsers were: – Microsoft Internet Explorer (60 percent) – Google Chrome (25 percent) – Mozilla Firefox (7 percent) – Apple Safari (5 percent) – Opera Software Opera (3 percent) • Thus, the HHI for this industry is equal to 602 + 252 + 72 + 52 + 32 = 4,308. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-20
21.
Oligopoly (cont’d) • Oligopoly,
efficiency and resource allocation – To the extent oligopolists have market power—the ability to individually affect the market price for the industry’s output—they lead to resource misallocations, just as monopolies do – But if oligopolies occur because of economies of scale, consumers might actually end up paying lower prices – All in all, there is no definite evidence of serious resource misallocation in the United States because of oligopolies Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-21
22.
Oligopoly (cont'd) • The
more U.S. firms face competition from the rest of the world, the less any current oligopoly will be able to exercise market power Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-22
23.
Strategic Behavior and
Game Theory • Explaining the pricing and output behavior of oligopoly markets – Reaction Function • The manner in which one oligopolist reacts to a change in price, output, or quality made by another oligopolist in the industry Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-23
24.
Strategic Behavior and
Game Theory (cont'd) • Game Theory – A way of describing the various possible outcomes in any situation involving two or more interacting individuals when those individuals are aware of the interactive nature of their situation and plan accordingly – The plans made by these individuals are known as game strategies Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-24
25.
Strategic Behavior and
Game Theory (cont'd) • Cooperative Game – A game in which the players explicitly cooperate to make themselves better off • Firms collude for higher than competitive rates of return • Noncooperative Game – A game in which the players neither negotiate nor cooperate in any way • Relatively few firms with some ability to change price Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-25
26.
Strategic Behavior and
Game Theory (cont'd) • Zero-Sum Game – A game in which any gains within the group are exactly offset by equal losses by the end of the game Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-26
27.
Strategic Behavior and
Game Theory (cont'd) • Negative-Sum Game – A game in which players as a group lose at the end of the game • Positive-Sum Game – A game in which players as a group are better off at the end of the game Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-27
28.
Strategic Behavior and
Game Theory (cont'd) • Strategies in noncooperative games – Strategy • Any rule that is used to make a choice such as “always pick heads” – Dominant Strategies • Strategies that always yield the highest benefit Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-28
29.
Example: The Prisoners’
Dilemma • A real-world example of game theory occurs when two people involved in a bank robbery are caught • What should they do when questioned by police? • The result has been called the prisoners’ dilemma Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-29
30.
Example: The Prisoners’
Dilemma (cont'd) • The two are interrogated separately and their interrogator indicates the following: 1. If both confess, they each get five years in jail for the crime 2. If neither confesses, they each get two years based on a lesser charge 3. If only one confesses, that person will go free, but the other receives ten years Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-30
31.
Example: The Prisoners’
Dilemma (cont'd) • Question – What would you do in this situation, keeping in mind no cooperation is involved between the two prisoners? Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-31
32.
Example: The Prisoners’
Dilemma (cont'd) • The prisoners’ alternatives are shown in a payoff matrix. There are four possibilities: 1. Both confess 2. Neither confesses 3. Prisoner 1 confesses; Prisoner 2 doesn’t 4. Prisoner 2 confesses; Prisoner 1 doesn’t Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-32
33.
Figure 26-1 The
Prisoners’ Dilemma Payoff Matrix Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-33
34.
Example: The Prisoner’s
Dilemma (cont’d) • Regardless of what the other prisoner does, each person is better off if she or he confesses • So confessing is the dominant strategy, and each ends up behind bars for five years Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-34
35.
Strategic Behavior and
Game Theory (cont'd) • Applying game theory to pricing strategies – Would you choose a high price or a low price? • Remember – No collusion Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-35
36.
Figure 26-2 Game
Theory and Pricing Strategies Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-36
37.
Strategic Behavior and
Game Theory (cont'd) • Opportunistic Behavior – Actions that, because long-run benefits of cooperation are perceived to be smaller, focus on short-run gains – An example might be writing a check that you know will bounce – Implies a noncooperative game which is not realistic—we make repeat transactions Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-37
38.
Strategic Behavior and
Game Theory (cont'd) • Tit-for-Tat Strategic Behavior – In game theory, cooperation that continues so long as the other players continue to cooperate Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-38
39.
The Cooperative Game:
A Collusive Cartel • Cartel – An association of producers in an industry that agree to set common prices and output quotas to prevent competition. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-39
40.
The Cooperative Game:
A Collusive Cartel (cont’d) • The rationale for a cartel and the seeds of its undoing – If all the firms in an industry can find a way to cooperatively determine how much to produce to maximize their combined profits, then they can form a cartel and jointly act as a single producer – This means that they must collude – They must act together to attain the same outcome that a monopoly firm would aim to achieve Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-40
41.
The Cooperative Game:
A Collusive Cartel (cont’d) • Cutting back on production – A fledgling cartel faces two fundamental problems • A monopoly producer maximizes economic profits by restraining its production to a rate below the competitive output rate • As soon as all producers in the cartel begin restraining production and charging a higher price, each individual member could theoretically increase its revenues and profits by charging a slightly lower price, raising production, and selling more units Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-41
42.
The Cooperative Game:
A Collusive Cartel (cont’d) • Enforcing a cartel agreement – Four conditions make it more likely that firms will be able to coordinate their efforts to restrain output and detect cheating, thereby reducing the temptation for participating firms to cheat: • • • • A small number of firms in the industry Relatively undifferentiated products Easily observable prices Little variation in prices Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-42
43.
The Cooperative Game:
A Collusive Cartel (cont’d) • Why cartel agreements usually break down – Studies have shown that most cartel agreements do not last for more than 10 years. In many cases, cartel agreements break down more quickly than that – One reason that cartels tend to break down is that the economic profits that existing firms obtain from holding prices above competitive levels provide an incentive for new firms to enter the market – Variations in overall economic activity also tend to make cartels unsustainable Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-43
44.
Network Effects • Network
Effect – A situation in which a consumer’s willingness to purchase a good or service is influenced by how many others also buy or have bought the item Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-44
45.
Network Effects (cont'd) •
Positive Market Feedback – Potential for a network effect to arise when an industry’s product catches on • Negative Market Feedback – The tendency for industry sales to spiral downward rapidly when the product falls out of favor Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-45
46.
Network Effects (cont’d) •
In some industries, a few firms can potentially reap most of the benefits of positive market feedback • There is a network effect present in the online auction industry, in which eBay, Amazon and Yahoo account for more than 80% of sales • When a small number of firms secure the bulk of payoffs resulting from positive market feedback, oligopoly is likely to emerge as the prevailing market structure Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-46
47.
Two-Sided Markets, Network
Effects, and Oligopoly • Two-sided markets – In a two-sided market, a platform firm provides a good or service that links together two groups of end users, such as those among groups A and B in Figure 26-3 – The platform establishes prices that are not necessarily the same for the two groups Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-47
48.
Two-Sided Markets, Network
Effects, and Oligopoly (cont’d) Figure 26-3 A Two-Sided Market Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-48
49.
Two-Sided Markets, Network
Effects, and Oligopoly (cont’d) • Four types of two-sided markets: – – – – Audience-making markets Matchmaking markets Transaction-based markets Shared-input markets • Network effects arise in two-sided markets Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-49
50.
Two-Sided Markets, Network
Effects, and Oligopoly (cont’d) • Two-Sided Oligopolistic Pricing • The presence of network effects in two-sided markets means that it is often the case that a few firms capture most of the payoffs associated with market feedback • Thus, oligopoly is the most common industry structure in these markets Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-50
51.
Example: Fishing for
Date Seekers with Ads Boosts PlentyOfFish • In the mid-2000s, the online matchmaking firm PlentyOfFish eliminated most fees for people seeking dates, which increased the number of participants on the site. • The resulting increase in customers generated a network externality. • This allowed PlentyofFish to collect fees from advertisers seeking to reach a large audience. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-51
52.
Figure 26-4 Shares
of Registered Users at Top Firms in the Online Dating Industry Source: U.S. Department of Commerce. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-52
53.
Table 26-4 Recent
Vertical Mergers Involving Large Global Enterprises Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-53
54.
You Are There:
Hyundai Goes Vertical • Through a series of vertical mergers, car manufacturer Hyundai has created a subsidiary that makes 12 million tons of steel per year. • John Krafcik, CEO of Hyundai, offers two rationales for vertical mergers. – Manufacturing its own steel allows Hyundai to coordinate its vehicle production process at lower short-run costs. – Hyundai has also been able to influence the development of lightweight steel. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-54
55.
Issues & Applications:
Concentration in the Textbook Publishing Industry • Figure 26-5 on the following slide displays recent shares of textbook sales by U.S. publishers. • The four-firm concentration ratio for this industry is 87.5 percent. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-55
56.
Figure 26-5 Sales
Shares in the Textbook Publishing Industry Source: U.S. Department of Commerce. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-56
57.
Issues & Applications:
Concentration in the Textbook Publishing Industry (cont’d) • In light of substantial concentration among only three textbook publishers, economists view the industry as an oligopoly. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-57
58.
Issues & Applications:
More Companies Are “Going Vertical” (cont’d) • Common themes for the mergers: – A desire to integrate different aspects of the production process within one firm instead of multiple firms – Most firms that merged are in traditionally oligopolistic industries Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-58
59.
Summary Discussion of
Learning Objectives • The fundamental characteristics of oligopoly – Economies of scale – Barriers to entry – Strategic dependence • Applying game theory to evaluate the pricing strategies of oligopolistic firms – Game theory looks at competition for payoffs – Depends on the strategies that others employ Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-59
60.
Summary Discussion of
Learning Objectives (cont'd) • Industry Features That Contribute to or Detract Efforts to Form a Cartel – – – – A small number of forms in the industry Relatively undifferentiated products Easily observable prices Little variation in prices Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-60
61.
Summary Discussion of
Learning Objectives (cont'd) • Why network effects and market feedback encourage oligopoly – Network effects arise when a consumer’s demand for a good or service is affected by how many other consumers also use the item – Oligopoly can arise because a handful of firms may be able to capture all of the positive market feedback Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-61
62.
Summary Discussion of
Learning Objectives (cont'd) • Multiproduct Firms and Product Compatibility – Product compatibility refers to the capability of an item sold by one firm to function with another firm’s complementary product – A multiproduct firm selling two or more complementary products may opt for incompatibility as it creates differentiation. A format battle may ensue, however. Copyright ©2014 Pearson Education, Inc. All rights reserved. 26-62
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