Analyzing Social Network Structures in the Iterated Prisoners Dilemma with Choice and Refusal

The Iterated Prisoners Dilemma with Choice and Refusal (IPD/CR) is an extension of the Iterated Prisoners Dilemma with evolution that allows players to choose and to refuse their game partners. From individual behaviors, behavioral population structures emerge. In this report, we examine one particular IPD/CR environment and document the social network methods used to identify population behaviors found within this complex adaptive system. In contrast to the standard homogeneous population of nice cooperators, we have also found metastable populations of mixed strategies within this environment. In particular, the social networks of interesting populations and their evolution are examined.