Recent evidence highlights the importance of social norms in many economic relations. Many of these relationships are long-term and provide repeated game incentives for performance. We experimentally investigate interaction effects of reciprocity and repeated game incentives in two treatments...

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...