This paper reexamines the widely-held wisdom that the currency exposure of international investments should be entirely hedged. It finds that the previously documented ability of hedges to reduce portfolio return variance holds at short horizons, but not at long horizons. At horizons of several...

This paper addresses the following basic capital budgeting question: Suppose that cross-sectional differences in stock returns can be predicted based on variables other than beta (e.g., book-to- market), and that this predictability reflects market irrationality rather than compensation for...

In this paper, we develop a new model for government cost-benefit analysis in the presence of risk. In our model, a benevolent government chooses the scale of a risky project in the presence of two key frictions. First, there are market failures, which cause the government to perceive project...