In this book Peter Diamond analyzes social security as a particular example of optimal taxation theory. Assuming a world of incomplete markets and asymmetric information, he uses a variety of simple models to illuminate the economic forces that bear on specific social security policy issues. The...

With heterogeneity in both skills and discount factors, the Atkinson-Stiglitz theorem that savings should not be taxed does not hold. We consider a model with heterogeneity of preferences at each earnings level. With some assumptions on the equilibrium, a small savings tax on high earners and a...

It is a natural presumption that there should be less distorting taxation when there are more decisions based on the prices distorted by taxation. This note shows the need for an additional assumption in order to reach the conclusion. We consider a competitive model with one consumption good,...