Distorted Gravity: The Intensive and Extensive Margins of International Trade
American Economic Review
vol. 98,
no. 4, September 2008
(pp. 1707-21)
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. (JEL F12, F13)Citation
Chaney, Thomas. 2008. "Distorted Gravity: The Intensive and Extensive Margins of International Trade." American Economic Review, 98 (4): 1707-21. DOI: 10.1257/aer.98.4.1707Additional Materials
JEL Classification
- F12 Models of Trade with Imperfect Competition and Scale Economies
- F13 Trade Policy; International Trade Organizations