Game Theory 101 (, 59): Tit for Tat in the Repeated Prisoners Dilemma

Grim trigger is an extremely vindictive strategy, forever punishing someone for a single misstep. Can less aggressive strategies still inspire cooperation Titfortat begins by cooperating and then duplicates the opponent s strategy from the previous period. Consequently, a single defection does not lead to continued defection forever. It is a Nash equilibrium for two players to adopt titfortat for sufficiently high discount factors, but we will later learn th