Identifying who engages in inter-group conflict – and if they do so why – may help to predict and potentially prevent inter-group conflicts. Yet, little is known about the heterogeneity of individuals' social preferences in inter-group conflict. We derive a typology and measure of...

We report an experiment on the effect of intergroup competition on group coordination in the minimal-effort game (Van Huyck et al., 1990). The competition was between two 7-person groups. Each player in each group independently chose an integer from 1 to 7. The group with the higher minimum won...