externality. A within-subjects measure of reticence to impose harm does not explain cooperation. But the externality makes … participants more pessimistic. However conditional on their beliefs participants are more, not less cooperative if cooperation …

We study how the willingness to enter long-term bilateral relationships affects cooperation even when parties have … little information about each other, ex ante, and cooperation is otherwise unenforceable. We experimentally investigate a … research, longer interactions facilitate cooperation. However, many individuals avoid long-term commitment, with uncooperative …

We explore the extent to which altruism, as measured by giving in a dictator game (DG), accounts for play in a noisy … version of the repeated prisoner's dilemma. We find that DG giving is correlated with cooperation in the repeated game when no … cooperative equilibria exist, but not when cooperation is an equilibrium. Furthermore, none of the commonly observed strategies …