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The General Validity of the Law of Comparative Advantage

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  • Deardorff, Alan V

Abstract

It is well known that the law of comparative advantage breaks down when applied to individual commodities or pairs of commodities in a many-commodity world. This paper shows that the law is nonetheless valid if restated in terms of averages across all commodities. Specifically, a theorem and several corollaries are derived which establish correlations between vectors of trade and vectors containing relative-autarky-price measures of comparative advantage. These results are proven in a general many-commodity model that allows for tariffs, transport costs, and other impediments to trade.
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  • Deardorff, Alan V, 1980. "The General Validity of the Law of Comparative Advantage," Journal of Political Economy, University of Chicago Press, vol. 88(5), pages 941-957, October.
    • Handle: RePEc:ucp:jpolec:v:88:y:1980:i:5:p:941-57
    DOI: 10.1086/260915
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