Estimating and Testing Non-Linear Models Using Instrumental Variables
---- Acknowledgements -----
We are very grateful to Matias Cattaneo and Javier Cano Urbina, who provided excellent research assistance and insightful substantive comments, as well as Martijn van Hasselt and Youngki Shin for their many comments and suggestions. We also thank Josh Angrist, David Card, Pedro Carneiro, Jim Heckman, Guido Imbens, and seminar participants at the 2008 UM/MSU/UWO Summer Labor Conference, UCSD, and Stanford. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.