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 …

change the payoff structure of the game in favor of cooperation. Second, this mechanism is robust even when players deviate …

level of cooperation appears to be higher in the socially-oriented context, but only when the uncertainty as regards the …

cooperation is shaped by the way information about risk is presented (from description or from experience) and by differences in … lotteries with equivalent levels of risk. Cooperation rates in games vary with different levels of risk across decision … stochastic social dilemmas than in the lotteries. The findings highlight how an uncertain environment shapes cooperation and call …

conflicts. A first experiment shows that a between-group conflict leads to within-group cooperation and particularly individuals … personal costs of within-group versus collective cooperation, supporting the weighted average social preference theory by …

equilibrium prediction that is based on the elicited conditional-cooperation preferences. Moreover, more often than not, beliefs …

efficiency. We find that the observed behavior is primarily determined by an imperfect conditional cooperation that prioritizes …