In The Bell Curve, Herrnstein and Murray argue that the U.S. economy is a meritocracy in which differences in wages (including differences across race and gender) are explained by differences in cognitive ability. In this paper we test their claim for wages conditional on occupation using a...

This paper considers two problems that arise in determining the role of ability in explaining the level of and change in the rate of return to schooling. (1) Ability and schooling are so strongly dependent that it is not possible, over a wide range of variation in schooling and ability, to...

This paper derives simply computed closed-form expressions for the Average Treatment Effect (ATE), the effect of Treatment on the Treated (TT), Local Average Treatment Effect (LATE) and Marginal Treatment Effect (MTE) in a latent variable framework for both normal and non-normal models. The...