and social norms, and trust. In a preregistered online experiment (n = 1,038), we find that biased institutions reduce …

vary. The experiment implements two marginal return types, low and high, and uses the information that members have about …

altruism, reputational concerns, and material incentives. We present an analysis of a unique data set that combines an … experimental measure of altruism, surveyed measures of other factors including reputational concerns, and call records from … explanations, we find that altruism and reputational concerns are positively associated with the decision to volunteer. Moreover …

it becomes scarce. In the second, restraint serves to conceal the actor's intrinsic motivation. In both cases, not …

quickly if we introduce two relevant features of social life into the experiment: (i) subjects can migrate across groups with …