NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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The Margins of Trade

Jonathan Eaton, Ana Cecília Fieler

NBER Working Paper No. 26124
Issued in July 2019
NBER Program(s):International Trade and Investment Program

We introduce quality differentiation and an extensive margin of products into a standard quantitative, general equilibrium model of international trade. Both the quality and the quantity of a product play a role in its contribution both to consumption and to production. The framework allows bilateral trade to vary at the extensive and intensive margins and the intensive margin of trade to vary at the quantity and unit-value margins. We estimate the parameters of the model using bilateral data on trade flows and on unit values in trade. The model captures (i) the well-documented increasing relation between unit values and both importer and exporter per capita income and (ii) how the extensive margin rises with importer and exporter size. But, unlike other contributions to the literature confronting these margins in international trade, our framework delivers a standard gravity formulation for trade flows and standard measures of the gains from trade apply.

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Document Object Identifier (DOI): 10.3386/w26124

 
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