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Ricardo's Theory of Comparative Advantage: Old Idea, New Evidence

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  • Costinot, Arnaud
  • Donaldson, Dave

Abstract

When asked to name one proposition in the social sciences that is both true and non-trivial, Paul Samuelson famously replied: `Ricardo's theory of comparative advantage'. Truth, however, in Samuelson's reply refers to the fact that Ricardo's theory of comparative advantage is mathematically correct, not that it is empirically valid. The goal of this paper is to assess the empirical performance of Ricardo's ideas. We use novel agricultural data that describe the productivity in 17 crops of 1.6 million parcels of land in 55 countries around the world. Crucially, this dataset contains information about the productivity of each parcel of land in all crops, not just those that are currently being grown. This direct information about relative productivity differences across economic activities allows us to compute, for the first time, the output predicted by Ricardo's theory of comparative advantage. Despite all of the real-world considerations from which this theory abstracts, we find that Ricardo's theory of comparative advantage has significant explanatory power in the data, at least within the scope of our analysis.

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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 8930.

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Date of creation: Apr 2012
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Handle: RePEc:cpr:ceprdp:8930

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Keywords: comparative advantage; Ricardian theory;

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  1. Arnaud Costinot, 2009. "An Elementary Theory of Comparative Advantage," NBER Working Papers 14645, National Bureau of Economic Research, Inc.
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  1. [??]????????????
    by himaginary in himaginaryの日記 on 2012-06-23 07:00:00
  2. [??]????????????
    by himaginary in himaginaryの日記 on 2012-06-23 07:00:00
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Cited by:
  1. Cecilia Bellora & Jean-Marc Bourgeon, 2014. "Agricultural Trade, Biodiversity Effects and Food Price Volatility," Working Papers hal-01052971, HAL.

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