This paper presnets first empirical results on moral hazard in demand for physician services, using a longitudinal dataset on 4578 individuals followed during two years. The data set contains two subgroups, one for which a copayment rate of 10% for physician visits was introduced in 1994, and an...

This paper discusses experimental design from an efficiency viewpoint. We interpret the design of social experiments as an economic intertemporal consumpion problem, as opposed to a statistical variance minimization problem, and contrast the difference between Pareto optimal sample size and...

This paper discusses goods for which the amount of consumption determines its duration, with our primary concentration on health-related consumption. We argue that the features of such goods result in unique implications for private pricing and R&D, as well as impact important components of...

This paper departs from John Roemer's theory of equality of opportunities. We seek to determine what part of observed outcome inequality may be attributed to differences in observed "circumstances", including family background, and what part is due to "personal efforts". We use a...

We study efficiency properties of allocations and equilibria in dynamic stochastic economies with finitely lived agents. Efficiency is assessed to the concept of interim optimality which considers the agents' welfare at their birth date in every possible circumstance which may occur at that...