Internal Trade and Aggregate Productivity
AbstractThe positive link between international trade and productivity is well established. However, research on magnitude and consequences of internal trade barriers, which inhibit the efficient geographic distribution of production within a country, is limited. Unique data from Canada and China provide an ideal opportunity to measure the magnitude - and effect on productivity - of barriers to internal trade. Using a flexible, micro-founded approach, we find between-province trade costs average 30% in Canada and over 50% in China (net of distance-effects). These costs are even higher under other plausible parameter values. Internal trade costs in both countries are significantly higher in poor regions. We further adapt a new-trade model to estimate the productivity impact of these barriers. Eliminating inter-provincial trade barriers increases productivity by over 15% in the median province and by over 8% for Canada as a whole, accounting for nearly half the productivity gap with the United States. For comparison, we find these benefits are larger than lowering international trade barriers by 20%. Internal trade barriers also account for over 40% of the regional income inequality across provinces. The gains are even larger for China. Further work will investigate the extent to which high internal trade barriers in developing countries contributes to cross-country income and productivity differences.
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Bibliographic InfoPaper provided by Society for Economic Dynamics in its series 2012 Meeting Papers with number 314.
Date of creation: 2012
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Postal: Society for Economic Dynamics Christian Zimmermann Economic Research Federal Reserve Bank of St. Louis PO Box 442 St. Louis MO 63166-0442 USA
Web page: http://www.EconomicDynamics.org/society.htm
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