Group membership increases cooperation in social dilemma games, altruistic donation in dictator games, and fair offers in ultimatum games. While the empirical study of group action has grown rapidly over the years, there is little agreement at the theoretical level on exactly why and how group...

We study conditional cooperation based on a sequential two-person linear public good game in which a trusting first contributor can be exploited by a second contributor. After playing this game the first contributor is allowed to punish the second contributor. The consequences of sanctioning...

Tax compliance in a between-subjects experiment was higher when the uncertainty about the occurrence of an audit was not resolved until three weeks after participants had filed their tax returns than in a control treatment with immediate uncertainty resolution. Results have important...

The current experimental study examined the effect of monetary rewards on tax compliance. Eighty-six participants were randomly assigned to one control and two reward conditions (low vs. high reward). Overall, tax compliance was not affected by the rewards. However, a change in compliance...

Recent experiments with the Dictator Game (and the ensuing discussions) have been affected by considerable confusion regarding the purpose of this design. A common complaint is that the design gives rise to fragile regularities and therefore is of little use for theory-testing. We take issue...

According to a tradition that goes back to David Hume, social conventions have a natural tendency to turn into norms. Normativity increases compliance and stabilizes individual behaviour in spite of changes in incentives. In this paper we report experimental data that confirm this insight and...

We present an experiment designed to test whether experienced regret and rejoicing evoked in a risk choice have an impact on subsequent intertemporal choice. We found that regret and rejoicing experienced prior to an intertemporal choice influenced considerably the way people relate to future:...

We used decision-making experiments to investigate tax compliance of women and men and focused on gender-role orientation as well as on the second-to-fourth digit ratio (2D:4D), a putative marker of prenatal testosterone exposure. In 60 experimental periods, participants were endowed with a...