We study the effects of voluntary participation on cooperation in collective action problems. Voluntary participation … may foster cooperation through an entry mechanism, which leads to assortative selection of interaction partners, or an …

opportunity for profitable cooperation. Our experimental method creates two groups of subjects who are similar but have different … long-run losses. Initially similar, cooperation rates for groups with different intelligence levels diverge, declining in … groups of lower intelligence, and increasing to reach almost full cooperation levels in groups of higher intelligence …

cooperation in a subsequent social dilemma game. The issues we study are part of the broader topic of whether there are behavioral … cooperation for pairs of market-winners, market-losers and mixed pairs and study both the cases where interaction in the social … experience has adverse effects on the efficiency of cooperation on both market-winner and market-loser pairs. In market …

We study the coevolution of cooperation, preferences and cooperative signals in an environment where individuals engage …

encourage cooperation may actually hurt morale, by convincing opportunistic team members to imitate and later take advantage of …

We use experimental methods to investigate whether pledges of commitment can improve cooperation in endogenously … findings show that pledges of commitment alone can increase cooperation and welfare in committed partnerships. The introduction … partnerships fall solely on the individual choosing to break up, pledges of commitment fail to improve cooperation and welfare. …