Consistency and Cautious Fictitious Play

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Consistency and Cautious Fictitious Play

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Title: Consistency and Cautious Fictitious Play
Author: Fudenberg, Drew; Levine, David

Note: Order does not necessarily reflect citation order of authors.

Citation: Fudenberg, Drew and David K. Levine. 1995. Consistency and cautious fictitious play. Journal of Economic Dynamics and Control 19(5-7): 1065-1089.
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Abstract: We study a variation of fictitious play, in which the probability of each action is an exponential function of that action's utility against the historical frequency of opponents' play. Regardless of the opponents' strategies, the utility received by an agent using this rule is nearly the best that could be achieved against the historical frequency. Such rules are approximately optimal in i.i.d. environments, and guarantee nearly the minmax regardless of opponents' behavior. Fictitious play shares these properties provided it switches 'infrequently' between actions. We also study the long-run outcomes when all players use consistent and cautious rules.
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