On the Magic Behind David Ricardo's Four Mystical Numbers
Building on Ruffin's recent interpretation of Ricardo's four numbers as labour embodied in trade rather than domestic labour coefficients, I identify the magic behind these four mystical numbers. I show that the magic lies in Ricardo's underlying logic in predicting the pattern of international trade. Using a single graphical framework, I show that Ricardo's logic provides a device for a unified treatment of the commodity and the factor content predictions of international trade with an arbitrary number of goods, factors and countries.
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- Ethier, Wilfred J., 1984. "Higher dimensional issues in trade theory," Handbook of International Economics, in: R. W. Jones & P. B. Kenen (ed.), Handbook of International Economics, edition 1, volume 1, chapter 3, pages 131-184 Elsevier.
- 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.
- Maneschi, Andrea, 2004. "The true meaning of David Ricardo's four magic numbers," Journal of International Economics, Elsevier, vol. 62(2), pages 433-443, March.
- Daniel M. Bernhofen & John C. Brown, 2005. "An Empirical Assessment of the Comparative Advantage Gains from Trade: Evidence from Japan," American Economic Review, American Economic Association, vol. 95(1), pages 208-225, March.
- Roy J. Ruffin, 2002. "David Ricardo's Discovery of Comparative Advantage," History of Political Economy, Duke University Press, vol. 34(4), pages 727-748, Winter.
- Deardorff, Alan V, 1982. "The General Validity of the Heckscher-Ohlin Theorem," American Economic Review, American Economic Association, vol. 72(4), pages 683-694, September.
- Piero Sraffa & L. Einaudi, 1930. "An Alleged Correction of Ricardo," The Quarterly Journal of Economics, Oxford University Press, vol. 44(3), pages 539-545.
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