Oligopoly Compared

Oligopoly Compared refers to the analysis of market structures where a small number of firms compete with each other, often resulting in barriers to entry and interdependent decision-making, as described by Cournot's oligopoly model, 1838.

Definition

Oligopoly Compared is a market structure in which a small number of firms, often with significant market share, compete with each other, resulting in price rigidity and non-price competition, as seen in the kinked demand curve model.

How It Works

The oligopoly market structure is characterized by mutual interdependence, where the actions of one firm affect the market and the actions of its competitors, as demonstrated by the prisoner's dilemma game theory model. In an oligopoly, firms often engage in non-price competition, such as advertising and product differentiation, to gain a competitive advantage, as seen in the cola wars between Coca-Cola and Pepsi. The Herfindahl-Hirschman Index (HHI) is a commonly used measure to assess the level of competition in an oligopoly market, with higher values indicating greater concentration and less competition, such as the US airline industry, which has an HHI of over 1,000 (US Department of Justice).

The Bertrand model of oligopoly, which assumes firms compete on price, predicts that firms will engage in price warfare, resulting in prices approaching marginal cost, as seen in the telecommunications industry, where firms like Verizon and AT&T compete on price and service quality. In contrast, the Cournot model, which assumes firms compete on quantity, predicts that firms will produce less than the monopolistic level, resulting in higher prices and lower output, as seen in the oil industry, where firms like ExxonMobil and Shell compete on quantity and price.

The Stackelberg model of oligopoly, which assumes firms have different levels of market power, predicts that the firm with the greatest market power will set its output level first, and the other firms will follow, resulting in a leader-follower dynamic, as seen in the automobile industry, where firms like Toyota and General Motors compete on quantity and price. The Sweezy model of oligopoly, which assumes firms have kinked demand curves, predicts that firms will engage in price rigidity, resulting in sticky prices, as seen in the retail industry, where firms like Walmart and Target compete on price and service quality.

Key Components

• Barriers to entry: high startup costs, economies of scale, and regulatory hurdles that prevent new firms from entering the market, such as the airline industry, where high capital requirements and regulatory approvals limit new entrants.
• Interdependent decision-making: firms in an oligopoly make decisions based on the expected actions of their competitors, such as the price leadership model, where one firm sets the price and others follow.
• Non-price competition: firms in an oligopoly compete on factors other than price, such as advertising, product differentiation, and service quality, as seen in the cosmetics industry, where firms like L'Oréal and Estee Lauder compete on brand image and product quality.
• Price rigidity: firms in an oligopoly may maintain prices at a certain level, even in the face of changing market conditions, due to kinked demand curves and fear of retaliation, as seen in the oil industry, where firms like ExxonMobil and Shell maintain prices despite fluctuations in demand.
• Mutual interdependence: firms in an oligopoly are aware of the actions of their competitors and adjust their strategies accordingly, resulting in a dynamic game of competition and cooperation, as seen in the telecommunications industry, where firms like Verizon and AT&T engage in price wars and service battles.

Common Misconceptions

Myth: Oligopolies always lead to higher prices and lower output — Fact: The Bertrand model of oligopoly predicts that firms will engage in price warfare, resulting in prices approaching marginal cost, as seen in the telecommunications industry, where firms like Verizon and AT&T compete on price and service quality.

Myth: Firms in an oligopoly always engage in non-cooperative behavior — Fact: The Stackelberg model of oligopoly predicts that firms may engage in cooperative behavior, such as price leadership, as seen in the automobile industry, where firms like Toyota and General Motors engage in leader-follower dynamics.

Myth: Oligopolies are always inefficient — Fact: The Cournot model of oligopoly predicts that firms may produce at a level that is socially optimal, as seen in the oil industry, where firms like ExxonMobil and Shell produce at a level that balances supply and demand.

Myth: Firms in an oligopoly always have perfect information — Fact: The Sweezy model of oligopoly predicts that firms may have imperfect information, resulting in price rigidity and sticky prices, as seen in the retail industry, where firms like Walmart and Target maintain prices despite fluctuations in demand.

In Practice

In the US airline industry, for example, the oligopoly market structure has resulted in price rigidity and non-price competition, with firms like American Airlines, Delta Air Lines, and United Airlines competing on factors such as service quality, route networks, and frequent flyer programs, with the HHI exceeding 1,000 (US Department of Justice), and Boeing producing ~800 aircraft annually (Boeing annual report), with a market share of over 60% (Teal Group).