Oligopoly

What Is an Oligopoly? Oligopoly is a market structure with a small number of firms, where each influences the others' actions. Key aspects include:

• Firms may collude to restrict output/fix prices for higher profits.

• Formation relies on economic, legal, and technological factors.

• The prisoner's dilemma poses a risk of cheating among firms.

• Government policies can regulate or encourage oligopolistic behavior.

Understanding Oligopoly Oligopolies include steel, oil, railroads, and grocery sectors, potentially hindering competition, innovation, and consumer welfare. Firms often set prices collectively or under a price leader.

Conditions for Oligopolies High entry costs, legal privileges, and customer value platforms contribute to oligopoly stability.

Stability Factors Firms collaborate to avoid competition, but price-fixing may occur subtly.

Prisoner's Dilemma Firms face incentives to cheat on agreements, which can be modeled using game theory; stability is achieved at Nash equilibrium.

Government Influence Regulations against collusion exist, but cartels can operate beyond oversight (e.g., OPEC).

Related Terms

• Imperfect Market: A market that doesn't meet perfect competition standards.

• Oligopsony: A market dominated by a few large buyers, concentrating demand.

• Sherman Antitrust Act: 1890 U.S. legislation outlawing monopolies and cartels to boost competition.