We study experimentally a two-stage common pool resource game. In the first stage, selected members of the group determine the level of protection for the resource. The protected fraction of the resource is equally shared among group members. In the second stage, the unprotected fraction of the...

The main objective with this paper is to test the hypothesis that peoples stated WTP for an environmental public good (old growth forest in Sweden) are sensitive to the respondents' relative income. To do that I use an experimental valuation question in a split-sample setting, conditioning the...

We develop a model that accounts for the decay of the average contribution observed in experiments on voluntary contributions to a public good. The novel idea is that people's moral motivation is "weak." Their judgment about the right contribution depends on observed contributions by group...