If a strict equilibrium is suggested as the solution of a strategicgame in normal form and if some but not all players are committedto their solution strategy, a reduced game results with only thestill non-committed as active players. The reduced game property (orconsistency axiom) demands that...

We report on an experiment designed to explore whether allowing individualsto voice their anger prevents costly punishment. For this sake, weuse an ultimatum minigame and distinguish two treatments: one in whichresponders can only accept or reject the o®er, and the other in which theycan also...

In the hybrid game, one proposer confronts two responders with veto power: one responder can condition his decisions on his own offer but the other cannot. We vary what the informed responder knows about the offers as well as the uninformed responder's conflict payoff. Neither variation affects...

We use information on students' past participation in economic experiments, as stored in our database, to analyze whether behavior in public goods games is affected by experience (i.e., previous participation in social dilemma-type experiments) and history (i.e., participation in experiments of...

Social institutions regulating group conduct have been regarded as necessary for human cooperation to transcend family bonds. However, many studies in economics and biology indicate that reciprocity based on repeated interaction su_ces to establish cooperation with non-kin. We shed light on the...