assumption that the salience of the advantages of mutual cooperation plays a decisive role. This hypothesis is successfully …Since Mancur Olson's "Logic of collective action" it is common conviction in social sciences that in large groups the … prospects of a successful organization of collective actions are rather bad. Following Olson's logic, the impact of an …

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 …

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 …