We experimentally study the effect of asymmetry on cooperation in a 40 period prisoner's dilemma game in fixed partner … symmetric ones. Asymmetry significantly decreases cooperation, as low-type players are more likely to defect after mutual … cooperation while high-type players initiate cooperation more often than the former. Asymmetry also has a significant negative …

three experiments (N = 1,993): in a preliminary experiment, we vary the payoffs over a large range. In our first main … our experiments and the complementary analyses is that cooperation in a PD increases with the gains of mutual cooperation …

-registered experiments (N = 1,074), we show that groups of prosocial individuals achieve substantially higher levels of cooperation. The …