contributions. This paper presents experimental results illustrating that the effects of risk and uncertainty depend on the employed … efficiency gains, the presence of risk and uncertainty about the public good's value is not detrimental to cooperation. This … ?nding casts doubt on the hypothesis that risk and uncertainty, per se, weaken people's willingness to contribute. …

certain what effects will result from a reduction of pollution. We show that if an agent is sufficiently risk averse … has two possible consequencies which depend on agent risk aversion. Therefore, understanding the implication of … precautionary attitude, leads us to the consideration of the agents' risk aversion characterization and studying the effect of an …

contributions. This paper presents experimental results illustrating that the effects of risk and uncertainty depend on the employed … efficiency gains, the presence of risk and uncertainty about the public good's value is not detrimental to cooperation. This … ?nding casts doubt on the hypothesis that risk and uncertainty, per se, weaken people's willingness to contribute. …

classical studies on voluntary contributions to public goods. The Nash equilibrium, under the assumption of risk neutrality …