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...

Generational selfishness is a central assumption in the vast literature on the life cycle model. Much of this literature deals with the impact of alternative government policies in light of self-interested generational behavior. Surprisingly, the choices of governments in virtually all of these...