Summary and Exam Tips for Market Structure on Imperfect Competition II
Market Structure on Imperfect Competition II is a subtopic of Microeconomics, which falls under the subject Economics in the IB DP curriculum. This section explores the dynamics of monopolistic competition and oligopoly.
In monopolistic competition, numerous firms operate with low barriers to entry, offering differentiated products. Firms can make abnormal profits or incur losses in the short run, but only achieve normal profits in the long run due to market entry. The demand curve is more elastic than in a monopoly but less so than in perfect competition, leading to some degree of market power. However, allocative inefficiency and market failure occur as price exceeds marginal cost ().
Oligopolies are characterized by a few large firms with high barriers to entry and significant interdependence. Firms may engage in collusive or non-collusive behavior, with the former often illegal due to its anti-competitive nature. The kinked demand curve explains price rigidity in non-collusive oligopolies. Game theory, particularly the prisoner's dilemma, illustrates strategic interactions and the potential for Nash equilibrium outcomes. Both market structures face allocative inefficiency and welfare loss, indicating market failure.
Exam Tips
- Understand Key Concepts: Be clear on the characteristics of monopolistic competition and oligopoly, including product differentiation and market power.
- Diagram Practice: Practice drawing and interpreting diagrams for monopolistic competition and oligopoly, especially for short-run and long-run scenarios.
- Game Theory: Familiarize yourself with basic game theory concepts, such as the prisoner's dilemma and Nash equilibrium, as they apply to oligopolies.
- Efficiency Analysis: Be prepared to discuss allocative inefficiency and welfare loss in both market structures, using as a key indicator.
- Real-World Examples: Use real-world examples to illustrate concepts like collusion and non-price competition, enhancing your understanding and exam responses.
