This paper provides a new explanation why several US states have implemented supermajority requirements for tax increases. We model a dynamic and stochastic OLG economy where individual preferences depend on age and change over time in a systematic way. In this setting, we show that the first...

This paper provides a new explanation why several US states have implemented supermajority requirements for tax increases. We model a dynamic and stochastic OLG economy where individual preferences depend on age and change over time in a systematic way. In this setting, we show that the first...

In three chapters I study the formation of social networks, and the impact the structures that arise may have in various economic settings. First, I develop a model of social network formation with heterogeneous agents and incomplete information. The model predicts an equilibrium in which agents...

In this dissertation I examine a set of crucial topics in the political economy of international trade, with an emphasis on firm-level heterogeneity. The first chapter is an empirical study of the new trade theories in which firm heterogeneity and trade costs play central roles in shaping the...

We analyze an overlapping generations model of voting over ``reform projects''. These resemble investments in that they first require some investment expenditure and later bring a payoff; consequently, older people are more conservative (against reforms) than younger ones. We show that if people...

Genetic tests can be expected to produce a large amount of economically important information in the future. What are the effects on a life insurance market if more information becomes available over time, for individuals and possibly also for insurers? Should people buy insurance before or...