An important issue in applications of multifactor models of asset returns is the appropriate number of factors. Most extant tests for the number of factors are valid only for strict factor models, in which diversifiable returns are uncorrelated across assets. In this paper, the authors develop a...

This paper develops a new estimation procedure for characteristic-based factor models of security returns. We treat the factor model as a weighted additive nonparametric regression model, with the factor returns serving as time-varying weights, and a set of univariate non-parametric functions...

We examine the impact of market dispersion on the performance of hedge funds. Market dispersion is measured by the cross-sectional volatility of equity returns in a given month.Using hedge fund indices and a panel of monthly returns on individual hedge funds, we find that market dispersion and...

This paper develops a simple model of the gap between socially and privately optimal bank lending when a bank has an overhang of impaired loans, and analyzes government policies designed to close this gap. The impaired loans have risky cash flows but observable market values. A number of basic...

This paper develops a restrictive procedure for evaluating economic policy decisions, by comparing actual economic history to a simulated history where a specific policy decision is replaced with a counterfactual, but credible, alternative. Our procedure is theoretically straightforward, but...