The opportunity to bargain often causes costs for at least one party in many economic situations, e.g. wage negotiations, joint ventures or interfirm cooperation. This paper studies such situations. A "strong" and a "weak" player have to agree how to divide the produced surplus. The "weak"...

This paper investigates if and how other-regarding preferences governing giving decisions in dictator games are affected in risky environments in which the payoff of the recipient is random. We demonstrate that, whenever the risk is actuarially neutral, the donation of dictators with a purely ex...

We analyze experimentally behavior in a finitely repeated public goods game. One of the main results of the literature is that contributions are initially high, and gradually decrease over time. Two explanations of this pattern have been developed: (i) the population is composed of free-riders,...

Centralized sanctioning institutions are of utmost importance for overcoming free-riding tendencies and enforcing outcomes that maximize group welfare in social dilemma situations. However, little is known about how such institutions come into existence. In this paper we investigate, both...

Economic and social interaction takes place between individuals with heterogeneous characteristics. We investigate experimentally the emergence and informal enforcement of different contribution norms to a public good in homogeneous and different heterogeneous groups. When punishment is not...