We experimentally investigate reference group formation and the impact of social comparisons in a three-player ultimatum game. The players compete in a real-effort task for the role of the proposer. The role of the responder is randomly allocated to one of the other two participants. The third...

We investigate reference group formation and the impact of social comparisons on ultimatum bargaining using a laboratory experiment. Three individuals compete in a real-e¤ort task for the role of the proposer in a three-player ultimatum game. The role of the responder is randomly allocated. The...