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 …

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 …

In this paper we show experimentally that conditional cooperation, a phenomenon described in the private provision of … determines if they overcome a rival group. This environment allows us to identify new determinants of conditional cooperation. We … observe conditional cooperation in successful groups and in groups where members contribute more than rivals (even if they …