Information Sharing in the Iterated Prisoner's Dilemma Game

Abstract

In the iterated prisoner's dilemma (IPD) game, players normally have access to their own history, without being able to communicate global information. In this paper, we introduce information sharing among players of the IPD game. During the co-evolutionary process, players obtain access, through information sharing, to the common strategy adopted by the majority of the population in the previous generation. An extra bit is added to the history portion in the strategy chromosome. This extra bit holds a value of 0 if the decisions to cooperate were greater than the decisions to defect in the last generation and 1 if otherwise. We show that information sharing alters the dynamics of the IPD game