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Distorted Gravity: The Intensive and Extensive Margins of International Trade

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  • Thomas Chaney

    (ECON - Département d'économie (Sciences Po) - Sciences Po - Sciences Po - CNRS - Centre National de la Recherche Scientifique)

Abstract

By considering a model with identical firms, Krugman (1980) predicts that a higher elasticity of substitution between goods magnifies the impact of trade barriers on trade flows. In this paper, I introduce firm heterogeneity in a simple model of international trade. I prove that the extensive margin and the intensive margin are affected by the elasticity of substitution in exact opposite directions. When the distribution of productivity across firms is Pareto, the predictions of the Krugman model with representative firms are overturned: the impact of trade barriers on trade flows is dampened by the elasticity of substitution, and not magnified.

Suggested Citation

  • Thomas Chaney, 2008. "Distorted Gravity: The Intensive and Extensive Margins of International Trade," Post-Print hal-03579844, HAL.
    • Handle: RePEc:hal:journl:hal-03579844
    DOI: 10.1257/aer.98.4.1707
    Note: View the original document on HAL open archive server: https://sciencespo.hal.science/hal-03579844
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    1. Ben S. Bernanke & Kenneth S. Rogoff (ed.), 2001. "NBER Macroeconomics Annual 2000," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262523140, December.
    2. Maurice Obstfeld & Kenneth Rogoff, 2001. "The Six Major Puzzles in International Macroeconomics: Is There a Common Cause?," NBER Chapters, in: NBER Macroeconomics Annual 2000, Volume 15, pages 339-412, National Bureau of Economic Research, Inc.
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