Do fixed-prize charitable lotteries generate more net revenue than do revenue-dependent lotteries? I present the results of an experiment designed to test a theoretical prediction of the relationship between the prize structure of a lottery funding a public good and individuals' participation in...

In a variant of the repeated prisoner's dilemma, if extra costs are associated with the verifications built into strategies that could otherwise produce Pareto efficient equilibria, the attainment of efficient play becomes problematical. Evolutionary-game versions of this dilemma are studied...