We analyse an experimental public goods game in which group members can endogenously determine whether they want to supplement a standard voluntary contribution mechanism with the possibility of rewarding or punishing other group members. We find a large and positive effect of endogenous...

We present an experimental study on the wasted resources associated with tax evasion. This waste arises from taxpayers and tax authorities, investing costly effort in concealment, respectively detect ion, of tax evasion. We show that (socially inefficient) efforts depend positively on the...

We test the hypothesis that "genuine" or "convincing" smiling is a costly signal that has evolved to induce cooperation in situations requiring mutual trust. Potential trustees in a trust game made video clips for viewing by potential trusters before the latter decided whether to send them...

We present experimental evidence on the existence of disadvantageous lies. Literature so far assumes that people do not lie to their monetary disadvantage. However, some people have preferences for appearing honest. If the utility gained from appearing honest outweighs the monetary payoff gained...

Taking the initiative is a crucial element of leadership and an important asset for many jobs. We assess leadership in a game in which it emerges spontaneously since people have a non-obvious possibility to take the initiative. Combining this game with small experimental games and...

This paper presents experimental evidence that tax compliance is path dependent. We show that individuals faced with the same current tax enforcement parameters, will nevertheless choose different compliance if they have faced different tax enforcement parameters in the past. This finding has...

This paper presents experimental evidence that contributions to a public good can be path-dependent for a limited time span. We study a repeated linear public-good game with punishment opportunities. Our data shows that subjects who had experienced a higher marginal return on public-good...