The Clinton administration has made job training and skill upgrading a major priority. Secretary of Labor Robert Reich has already presented a bold program for skill enhancement drawing on a new consensus in certain circles of the social science and policy communities about the need to upgrade...

This paper develops and applies a Bayesian approach to Exploratory Factor Analysis that improves on ad hoc classical approaches. Our framework relies on dedicated factor models and simultaneously determines the number of factors, the allocation of each measurement to a unique factor, and the...

We consider the identification of the average treatment effect in models with continuous endogenous variables whose impact is heterogeneous. We derive a testable restriction that allows us to assess the degree of unobserved heterogeneity. Our analysis uses assumptions relating to the Local...