I present a model of optimal contracts between firms and workers, under limited commitment and with worker savings. A central feature of the model is that firms can provide insurance against unemployment, by targeting a path of wages that encourages wealth accumulation. I provide an analytical...

In this study, using Japanese household panel data, we analyze how well idiosyncratic income risks are shared by regions. We find that geographic mobility influences individual consumption growth rates, suggesting that complete asset markets fail to exist. We reject the full insurance hypothesis...

We study a continuous-time version of the optimal risk-sharing problem with one-sided commitment. In the optimal contract, the agent's consumption is non-decreasing and depends only on the maximal level of the agent's income realized to date. In the complete-markets implementation of the optimal...

This paper studies a competitive general equilibrium model with default and endogenous collateral constraints. Even though all collateralized contracts are allowed, the possibility and desirability of trade in spot markets (or the equivalent trade in ex ante asset backed securities) creates...

In a context in which individuals might default on their debts and subsequently be excluded from credit markets, holding money helps agents smooth their consumption during periods in which they cannot borrow. Therefore holding money makes the punishment to default less severe. In this context,...

In this paper, we prove the existence of a recursive competitive equilibrium (RCE) for an Aiyagari style economy with permanent income shocks and perpetual youth structure. We show that there exist equilibria where borrowing constraints are never binding. This allows us to establish a...

Two key components of the upcoming health reform are a reorganization of the individual health insurance market and an increase in income redistribution in the economy. Which component contributes more to the welfare outcome of the reform? We address this question by constructing a general...

A major source of insurance coverage for non-elderly adults in the US is employer-based health insurance market. Every participant of this market gets a tax subsidy since premiums are excluded from taxable income. However, people have different incentives to participate in the employer-based...

Two key components of the upcoming health reform in the U.S. are a new regulation of the individual health insurance market and an increase in income redistribution in the economy. Which component contributes more to the welfare outcome of the reform? We address this question by constructing a...

Abstract Medical bankruptcy was at the heart of the health care reform debate. According to Himmelstein et al. (2009), 62.1 percent of bankruptcies in the United States in 2007 were due to medical reasons. At the same time over 15 percent of Americans had no health insurance. The 2010 health...