Factor Prices and International Trade: A Unifying Perspective
---- Acknowledgements -----
We thank Arnaud Costinot, Javier Cravino, Gene Grossman, Stephen Redding, and Andrés Rodríguez-Clare for very useful comments and the National Science Foundation (under Grant SES-0962261) for research support. A previous version of this paper circulated under the name "International Trade Patterns, the Skill Premium, and Heterogeneous Firms." The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.