Forgiving-Proof Equilibrium in Infinitely Repeated Games

Miguel Aramendia (), Ruiz Luis and Quan Wen ()
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Ruiz Luis: Universidad del Pais Vasco, luismariano.ruiz@ehu.es

The B.E. Journal of Theoretical Economics, 2008, vol. 8, issue 1, 17

Abstract: In repeated games, equilibrium often requires that any deviation be punished in the continuation, regardless of whether it is beneficial to the other players. It seems against the nature of non-cooperative game theory for the other players to decide what to do based on what one player did, rather than on the well-being of themselves. We introduce a new solution concept called a forgiving-proof equilibrium that recommends continuing as if nothing had happened after a player deviates without harming the others. A folk theorem is established to characterize the set of forgiving-proof equilibrium payoffs when players are sufficiently patient. The concept of forgiving-proof equilibrium significantly reduces the set of equilibrium outcomes in many repeated games.

Keywords: infinitely repeated games; folk theorem (search for similar items in EconPapers)
Date: 2008
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DOI: 10.2202/1935-1704.1440

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