NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Estimating Trade Flows: Trading Partners and Trading Volumes

Elhanan Helpman, Marc Melitz, Yona Rubinstein

NBER Working Paper No. 12927
Issued in February 2007

---- Acknowledgements -----

We thank Moshe Buchinsky, Zvi Eckstein, Gene Grossman, Marcelo Moreira, Ariel Pakes, Jim Powell, Manuel Trajtenberg, and Zhihong Yu for comments. Dror Brenner and Brent Neiman provided superb research assistance. Helpman thanks the NSF for financial support. Melitz thanks the NSF and the Sloan Foundation for financial support, and the International Economics Section at Princeton University for its hospitality. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.

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