identity between the leader and her followers is beneficial for cooperation: average contributions are more than 30% higher … identities. We find no effect on cooperation when only part of the followers share the leader's identity, or when followers share … instrument to promote cooperation. …

We study the effect of group size on cooperation in voluntary contribution mechanism games. As in previous experiments … find that cooperation is highest of all in twoperson groups. The findings in the high MPCR condition are consistent with … those from n-person prisoner's dilemma and oligopoly experiments that suggest it is more difficult to sustain cooperation in …

We experimentally investigate cooperation in privileged groups which according to Olson (1965) are groups in which at … opportunities, heterogeneity crucially affects cooperation and coordination within groups. Compared to non-privileged groups …

cooperation through two mechanisms: an entry mechanism, which leads to assortative selection of interaction partners, or an exit …

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 …

interaction between the observability of the cooperation of others and the absence of punishment targeted at cooperative …

We study the effects of voluntary participation on cooperation in collective action problems. Voluntary participation … may foster cooperation through a mechanism of assortative selection of interaction partners based on false consensus bias …

We examine the effect of payoff variations on cooperation in one-shot prisoner's dilemma games. We focus on three … impact on cooperation. Temptation directly deters cooperation and indirectly harms cooperation by lowering beliefs about the … opponent's cooperativeness. Efficiency indirectly affects cooperation through beliefs, but the magnitude of the effect is …

-social 'types'. Moreover, we find that cooperation and reciprocity rates drop substantially after subjects have been exposed to rent …

urban and rural participants of young and mature age cohorts. Russia is interesting for studying voluntary cooperation … cooperation-enhancing effect of punishment. An important reason is that there is substantial punishment of high contributors in … voluntary cooperation that are sustained by sanctioning free riders only. -- social norms ; free riding ; misdirected punishment …