Complexity Explorer Santa Fe Institute

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Game Theory II- Dynamic Games

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5.1 Cooperation in the Infinitely Repeated Prisoner's Dilemma » Quiz Solution

True or False: The strategy "Always Confess" for both players is an equilibrium in the infinitely repeated prisoner's dilemma.

(a)  True

(b) False

 Explanation : If one of the players is always confessing, regardless of what the other player is doing, then neither player has anything to gain by not confessing (i.e. there is no "punishment" for confessing). Therefore, "Always Confess" by both players is an equilibrium strategy.