We examine the effect of endogenous and exogenous risk on the equilibrium (expected) membership of an International Environmental Agreement when countries are risk averse. Endogenous risk arises when countries use mixed rather than pure strategies at the participation game, and exogenous risk...

We examine whether prior exposure to environments with a varying degree of risk affects individuals’ risk-taking behavior. Using a laboratory experiment, we find that subjects exposed to a high risk environment exhibit higher levels of risk aversion than those who were exposed to a moderate or...

This paper incorporates identity into a model of voluntary public good contribution. An ideal of contributing to public goods divides players to di¤erent social categories: Players who identify with the ideal become insiders, obtaining identity utility but incurring disu- tility if their...