This paper examines several aspects of the debate about the causes of the U.S. current account deficit in the 1980's. It surveys several popular explanations before developing two theoretical models of international capital flows. The first model is Ricardian, and it extends the analysis of...

We study market illiquidity in an economy subject to non-fundamental shocks. Asset trading occurs via decentralized one-on-one bargaining. The model has multiple rational expectations equilibria; we associate certain Pareto inferior equilibria with liquidity crises. The government can improve...

Stocks with recent past high idiosyncratic volatility have low future average returns around the world. Across 23 developed markets, the difference in average returns between the extreme quintile portfolios sorted on idiosyncratic volatility is -1.31% per month, after controlling for world...