This paper studies the design of a pay-as-you-go social security system in a society where fertility is in part stochastic and in part determined through capital investment. If parents' investments in children are publicly observable, pension benefits must be linked positively to the the level...

This paper introduces a general equilibrium, overlapping generations model of the principal- agent problem. Bargaining power, occupational choice, and the returns to each occupation are endogenous. Individuals live for two periods and must work when young. When old, they have a choice between...

Revenue sharing can be used to discourage low tax regions from competing for capital and firms with high tax regions. However, with heterogeneous regions, revenue sharing involves net transfers across regions and creates a 'moral-hazard' problem that is, regions may want to invest less in market...

This note presents a modest extension of the very useful "theorem of the deductible" (Arrow, American Economic Review, 1963). The extension concerns ex post moral hazard in medical insurance. Under full insurance above a deductible, the marginal cost of treatment to the insured is zero,...

We consider a start-up firm which applies for a bank loan to implement a project based on complementarity activities. The firm has the possibility to improve the complementarity effect by coordinating the activities. Coordination is costly and can be made either by using internal human resources...