I consider transactions involving asymmetric prisoners' dilemmas between pairs of players selected chosen from two large populations. Games are played repeatedly, but information about cheating is not adequate to sustain cooperation, and there is no official legal system of contract enforcement....

We consider the political economy of a monetary union wheremember governments attempt to influence the policy of the commoncentral bank. Modeling this as a common agency with incentivecontracts, we show that if incentives are all that matters for the bank,the equilibrium implements a weighted...