Market Size, Trade, and Productivity
---- Acknowledgements -----
We are grateful to Richard Baldwin, Alejandro Cunat, Gilles Duranton, Rob Feenstra, Elhanan Helpman, Tom Holmes, Alireza Naghavi, Diego Puga, Jacques Thisse, Jim Tybout, Alessandro Turrini, Tony Venables, and Zhihong Yu for helpful comments and discussions. The final draft also greatly benefited from three anonymous referee reports and comments from the editor. Ottaviano thanks MIUR and the European Commission for financial support. Melitz thanks the NSF and the Sloan Foundation for financial support. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.