This paper underlines that reciprocity has powerful implications for many economic fields. [editors EconBiz].

This paper provides an experimental evidence indicating that incentivecontracts may undermine voluntary cooperation.

In this Paper we provide experimental evidence indicating that incentive contracts may cause a strong crowding out of voluntary cooperation. This crowding-out effect constitutes costs of incentive provision that have been largely neglected by economists. In our experiments the crowding-out...

This paper shows that reciprocity has powerful implications for many economic domains. It is an important determinant in the enforcement of contracts and social norms and enhances the possibilities of collective action greatly. Reciprocity may render the provision of explicit incentive...

In this chapter we provide a selective survey of experiments to investigate the potential of social motivations in explaining labour market phenomena. We argue that laboratory experiments are a useful instrument to explore issues in labour market theory and personnel economics. Our starting...

This paper provides strong evidence challenging the self-interest assumption that dominates the behavioral sciences and much evolutionary thinking. The evidence indicates that many people have a tendency to voluntarily cooperate, if treated fairly, and to punish non-cooperators. We call this...