We report on an experiment using video technology to study effects of communication on donations to and discrimination between potential receivers. The experimental design eliminates strategic factors by allowing two receivers to unilaterally communicate with an anonymous dictator before the...

To explain why pre-play communication increases cooperation in games, one refers to a) strategic causes such as efficient communication or reputation effects, and b) changes in the utilities due to social processes. Hitherto experimental support for both explanations is mixed and confounded. Our...

A two-persons bargaining problem often consists of initially incompatible demands that can be unilaterally reduced by sequential concessions. In a 2 x 2 x 2-factorial design we distinguish between reliable and unreliable concessions, between a static and dynamic settings and between symmetric...

We study an ultimatum experiment in which the responder does not know the offer when accepting or rejecting. Unconditional veto power leads to acceptances, although proposers are significantly greedier than in standard ultimatum games, and this is anticipated by responders.

A procurement contract is granted by a bureaucrat (the auctioneer)who is interested in a low price and a bribe from the provider.The optimal bids and bribes are derived based on an iid private costassumption. In the experiment, bribes are negatively framed (betweensubjectstreatment) to capture...

Hegemony is a central feature of contemporary international politicsbut it remains seriously under-theorized. We draw on cooperative game theoryto represent and analyze different aspects of hegemony. After developing ageneral conception of hegemony, we analyze the circumstances under which...

We report on an experiment designed to explore the interrelation of otherregardingconcerns with attitudes towards risk and delay when the latterhave a social dimension, i.e., pertain to one's own and another person'spayos. For this sake, we compare evaluations of several prospects, eachof which...

We study a market in which both buyers and sellers can decide to preempt and set theirquantities before market clearing. Will this lead to preemption on both sides of the market,only one side of the market, or to no preemption at all? We …nd that preemption tends to beasymmetric in the sense...

In close interaction, group allocations are often fair due to our desire to betreated fairly and to act fairly. When this desire conflicts with other strong motivationsa typical reaction is to trade off fairness against these other concerns. Inequ(al)ity aversion allows capturing such trade off...