In this paper we develop new estimation methods for identifying causal effects based on the idea that the amount of selection on the observed explanatory variables in a model provides a guide to the amount of selection on the unobservables. Our approach involves the use of factor model as a way...

In this paper, we examine three main questions concerning wages. First, how do wages of native workers depend on the skills of the worker and the characteristics of an economy? Second, what do differences between the characteristics of the US and the home country economies predict about the wage...