to enforce cooperation within these different regimes. This paper develops a measure of the tightness of historical … readily support in-group members in need. This cooperation regime is enforced by tribalistic moral values, emotions of … social cooperation systems …

highlighting the role of reputation mechanisms in sustaining cooperation. Reputational concerns can deter defection in one … cooperation within a group, we show theoretically that interactions of individuals from a punishment-based culture with those from … a culture of image scoring can lead to widespread inter-group tensions. Mutual cooperation is a more likely outcome if …

explain differences in the rate of human capital accumulation on the job. Data tracking national soccer team performance and … individual has been a member of an elite team than when he has been a member of lower level teams. The conclusion is borne out by … a rich set of complementary data on: national team performance, player-level performance, performance of foreign players …

perspectives: (1) individual level (the degree to which team members specialize vs. work as generalists), (2) activity level (the … degree to which activities are concentrated among few team members vs. distributed among many) and (3) the intersection … explore team-based knowledge production using a newly available type of data - the disclosures of author contributions on …

The functioning and well-being of any society and organization critically hinges on norms of cooperation that regulate …