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CFA Level I · CFA Level I Exam · The Firm and Market Structures

Which feature best distinguishes monopolistic competition from oligopoly?

Firms in monopolistic competition need not consider rivals' individual reactions to their pricing. There are many sellers, so no single firm's action materially affects others. In oligopoly, few firms are interdependent, while differentiation and price above marginal cost appear in both.

  1. AFirms use product differentiation
  2. BFirms can set price above marginal cost
  3. CFirms need not consider rivals' individual reactions to their pricingCorrect

Explanation

Monopolistic competition has many small sellers, so each firm ignores individual rivals' reactions. In oligopoly, few firms are interdependent and must anticipate rivals' responses. Product differentiation and price above marginal cost occur in both structures.

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