This paper presents new instrumental variables estimators for nonparametric models with discrete endogenous regressors. The model specification is sufficiently general to include structural models, triangular simultaneous equations and certain models of measurement error. One motivation of the...

We examine the role of different explanations for the lack of flows of capital from rich to poor countries---the Lucas paradox---in an empirical framework. Broadly speaking, the theoretical explanations for this paradox include differences in fundamentals affecting the production structure...