AP®︎ Microeconomics: Topic 4.5 Flashcards

Master key terms and definitions for Topic 4.5 of AP Microeconomics – Oligopoly and Game Theory to help you prep for quizzes and the AP exam.


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Term

Oligopoly

Definition

A market with few interdependent firms, high entry barriers, and inefficient output.

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Oligopoly
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A market with few interdependent firms, high entry barriers, and inefficient output.

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Duopoly
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An oligopoly with only two firms competing in the same market.

PRD-3.C
Interdependence
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A condition where each firm's decisions depend on expected reactions from rival firms.

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Price Leadership
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A situation where one firm sets price changes and rival firms tend to follow.

PRD-3.C
Game
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A situation where each player's payoff depends on both their own and others' choices.

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Strategy
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A complete plan describing the action a player will take in every situation.

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Payoff Matrix / Normal Form
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A table showing each player's strategies and the payoff from every strategy combination.

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Dominant Strategy
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An action that gives a higher payoff no matter what the other player does.

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Nash Equilibrium
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An outcome where no player can gain by changing alone, given others' choices.

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Prisoner's Dilemma
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A game where each player chooses self-interest, producing a worse outcome than cooperation.

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Noncooperative Outcome
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The result when firms act independently, often lowering price and reducing profits.

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Incentive to Change a Dominant Strategy
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The minimum payoff increase needed to make another action yield a higher payoff.

PRD-3.C
Collusion and Cartel
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An agreement among oligopolists to act like a monopoly by raising price and restricting output.

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Cooperative Outcome
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The result when players work together to maximize their combined payoffs.

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