We show in a public goods experiment on three continents that conditional cooperation is a universal behavioral regularity. Yet, the number of conditional cooperators and the extent of conditional cooperation are much higher in the U.S.A. than anywhere else. -- conditional cooperation ; public...

We experimentally investigate how affective processes influence proposers’and responders’ behaviour in the Ultimatum Game. Using a dualsystemapproach, we tax cognitive resources through time pressure andcognitive load to enhance the influence of affective processes on behaviour.We find that...

Economic theory has evolved without paying proper attention to behavioral approaches,especially to social, economic, and cognitive psychology. This has recently changed byincluding behavioral economics courses in many doctoral study programs. Although thisnew development is most welcome, the...

This paper experimentally investigates whether risk-averseindividuals punish less if the outcome of punishment is uncertain thanwhen it is certain. Our design includes three treatments: Baseline inwhich the one-shot prisoner’s dilemma game is played; CertainPunishment in which the prisoner’s...

A small lie appears trivial but it obviously violates moral commandments. We analyze whetherthe preference for others’ truth telling is absolute or depends on the size of a lie. In a laboratoryexperiment we compare punishment for different sizes of lies controlling for the resultingeconomic...

An apology is a strong and cheap device to restore social or economic relationships thathave been disturbed. In a laboratory experiment we find that harmdoers use apologies inparticular if they fear punishment and when their intentions cannot be easily inferred. Afteroffenses with ambiguous...