We study the stability of voluntary cooperation in response to varying rates at which a group grows. Using a laboratory public-good game with voluntary contributions and economies of scale, we construct a situation in which expanding a group's size yields potential efficiency gains, but only if...

We study a dynamic model of environmental protection in which the level of pollution is a state variable that strategically links policy making periods. Policymakers are forward looking but politically motivated: they have heterogeneous preferences and do not fully internalize the cost of...

This study analyses the promotion of collective action for agri-environmental public goods and addresses externalities by reviewing the experience of various OECD member countries. Twenty-five cases from 13 countries (Australia, Belgium, Canada, Finland, France, Germany, Italy, Japan, the...

Voluntary environmental programs (VEP) are institutions that encourage participating actors to produce environmental public goods beyond the requirements of government law. Drawing on the club approach to the study of VEPs, we identify four collective action challenges facing VEPs. First,...