Demand for insurance can be driven by high risk aversion or high risk. We show how to separately identify risk preferences and risk types using only choices from menus of insurance plans. Our revealed preference approach does not rely on rational expectations, nor does it require access to...

With heterogeneity in both skills and preferences for the future, the Atkinson-Stiglitz result that savings should not be taxed with optimal taxation of earnings does not hold. Empirical evidence shows that on average people with higher skills save at higher rates. Saez (2002) suggests that with...

Recent empirical work finds that surprisingly little variation in the demand for insurance is explained by heterogeneity in risks. I distinguish between heterogeneity in risk preferences and risk perceptions underlying the unexplained variation. Heterogeneous risk perceptions induce a systematic...

With heterogeneity in both skills and discount factors, the Atkinson- Stiglitz theorem that savings should not be taxed does not hold. In a model with heterogeneity of preferences at each earnings level, introducing a savings tax on high earners or a savings subsidy on low earners increases...

We propose a mechanism which implements a unique solution to the bargaining problem with two players in subgame-perfect equilibrium. Players start by making claims and accept a compromise only if they cannot gain by pursuing their claim in an ultimatum. The player offering the lowest resistance...

Individuals have differing beliefs about risks they face and their ability to mitigate these risks. Profit-maximizing firms exploit these differences, even if beliefs are unobservable. I show that firms screen identical agents with different beliefs by providing less insurance to optimists than...