Earlier Version: "Evolution and Information in a Prisoner's Dilemma Game"
Phillip Johnson, David K. Levine and Wolfgang Pesendorfer
October 25, 1996
revised: May 18, 1999
Abstract: In an environment of anonymous random matching, Kandori  showed that with a sufficiently rich class of simple information systems the folk theorem holds. We specialize to a gift-giving game and examine the stochastic stability of a process of learning and evolution in this setting. If the benefit of future altruism is too small, then there is no altruism. When the benefit of altruism is large then only altruism will survive in the very long run.