Nash Equilibrium vs Prisoner's Dilemma
Nash Equilibrium and Prisoner's Dilemma are two Market Structures concepts in AP Economics that students often mix up. In short: nash equilibrium is nash Equilibrium is a stable state of a game where no player can improve their payoff by unilaterally changing their strategy. Meanwhile, prisoner's dilemma is the prisoner's dilemma is a game theory scenario where two rational individuals acting in their own self-interest do not produce the optimal outcome for either. Here is how they compare side by side.
Nash Equilibrium is a stable state of a game where no player can improve their payoff by unilaterally changing their strategy.
In a Nash Equilibrium, each player's strategy is optimal given the strategies of the other players. No player can benefit by changing their strategy while the other players keep theirs unchanged. Nash Equilibria can occur in non-cooperative games with two or more players.
The prisoner's dilemma is a game theory scenario where two rational individuals acting in their own self-interest do not produce the optimal outcome for either.
In oligopoly, it explains why firms may fail to collude even when mutual cooperation would lead to higher joint profits, because each has an incentive to cheat on the agreement to gain a short-term advantage.
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