Group-identity and long-run cooperation: an experiment

We stress-test the limits of power group identity in context cooperation by constructing laboratory economies where participants confront an indefinitely repeated social dilemma as strangers. Group is artificially induced random assignment to color-coded groups, and reinforced initial task played in-group fixed pairs. Subsequently subjects interact out-group large economies, Indefinite repetition guarantees full equilibrium. Decision-makers can discriminate based on affiliation, but cannot observe past behaviors. find no evidence biases. This suggests that effects are less likely emerge when players easily compare characteristics which base categorizations