. While there is conflicting experimental evidence on the temporal stability of cooperation preferences in public goods … literature by testing whether social identity impacts on cooperation preferences in public goods provision. Specifically, our … random, in and out group matching protocols. Our findings indicate that cooperation preferences are not stable across these …

We show in a public goods experiment on three continents that conditional cooperation is a universal behavioral … regularity. Yet, the number of conditional cooperators and the extent of conditional cooperation are much higher in the U ….S.A. than anywhere else. -- conditional cooperation ; public goods ; experiment …

Previous experiments have found a moderate, positive effect of group size on cooperation in voluntary contribution … results from n-person prisoner's dilemma and oligopoly experiments where group size has a negative effect on cooperation. In … mechanism ; cooperation ; group size …

cooperative behavior. We experimentally confirm this hypothesis in a public goods game with a salient norm that cooperation was …