We analyze the coordination problem of agents deciding to join a group that uses membership revenues to provide a discrete public good and excludable benefits. The public good and the benefits are jointly produced, so that benefits are valued only if the group succeeds in providing the public...

How and why do groups form? In many cases, group formation is endogenous to the actions that individual members take and the norms associated with these actions. In this paper, we conduct an experiment that allows groups to form endogenously in the context of the classic voluntary contribution...

Group identification refers to the problem of classifying individuals into groups (e.g., racial or ethnic classification). We consider a multinary group identification model where memberships to three or more groups are simultaneously determined based on individual opinions on who belong to what...

The German Constitutional Court is radically different from the (mostly US) courts in which panel effects have been studied so widely. On the one hand, to a large extent, ideological and gender bias are neutralized by design. On the other hand, panels are not randomly composed. This makes it...

Panel effects have been widely studied in randomly composed panels. However for many courts, panel composition stays constant. Then judges become familiar with each other. They know what to expect from each other. There is room for mutual trust. A local culture may emerge. If rejection is the...

The German Constitutional Court is radically different from the (mostly US) courts in which panel effects have been studied so widely. On the one hand, to a large extent, ideological and gender bias are neutralized by design. On the other hand, panels are not randomly composed. This makes it...

Social and political inequality among individuals is a common driving force behind the breakdown in cooperation. In this paper, we theoretically and experimentally study cooperation among individuals faced with a sequence of collective-action problems in which the benefits to cooperation are...

This paper provides strong evidence supporting the long-standing speculation that decision-making in groups has a dark side, by magnifying the prevalence of anti-social behavior towards outsiders. A large-scale experiment implemented in Slovakia and Uganda (N=2,309) reveals that deciding in a...

This paper provides strong evidence supporting the long-standing speculation that decision-making in groups has a dark side, by magnifying the prevalence of anti-social behavior towards outsiders. A large-scale experiment implemented in Slovakia and Uganda (N=2,309) reveals that deciding in a...

This paper investigates whether distributional conflicts become more likely when groups are involved in the fight. We present results from a laboratory experiment in which two parties can appropriate resources via a contest or, alternatively, take an outside option. Keeping monetary gains...