Economic and social interaction takes place between individuals with heterogeneous characteristics. We investigate experimentally the emergence and informal enforcement of different contribution norms to a public good in homogeneous and different heterogeneous groups. When punishment is not...

In this paper we experimentally investigate whether partial coercion can in combination with conditional cooperation increase contributions to a public good. We are especially interested in the behavior of the non-coerced populations. The main finding is that in our setting conditional...