Zeros, Quality and Space: Trade Theory and Trade Evidence
NBER Working Paper No. 13214
Bilateral, product-level data exhibit a number of strong patterns that can be used to evaluate international trade theories, notably the spatial incidence of “export zeros” (correlated with distance and importer size), and of export unit values (positively related to distance). We show that leading theoretical trade models fail to explain at least some of these facts, and propose a variant of the Melitz model that can account for all the facts. In our model, high quality firms are the most competitive, with heterogeneous quality increasing with firms’ heterogeneous cost.
A data appendix is available at http://www.nber.org/data-appendix/w13214
This paper was revised on January 5, 2010
Document Object Identifier (DOI): 10.3386/w13214
Published: Richard Baldwin & James Harrigan, 2011. "Zeros, Quality, and Space: Trade Theory and Trade Evidence," American Economic Journal: Microeconomics, American Economic Association, vol. 3(2), pages 60-88, May. citation courtesy of
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