represented as (i,q,q) triples as in [Nowak and May, 1992]. The tags are represented as arbitrary real numbers in [0,1], and tag … selection is biased toward agents with similar tags. Each agent plays a small sample of other agents each generation. The … individuals playing the IPD. Over a fairly broad range of conditions, populations that use tags attain significantly higher levels …

cooperation who read tags to interact either discriminately or selectively with tolerably similar partners. In our study on a one …-shot Prisoner\'s Dilemma game, artificial agents with tags and tolerance perceive dissimilarities to local neighbors to cooperate … with in-group and otherwise defect. They imitate tags and learn tolerance from more successful neighbors. In terms of …