comparative advantage


comparative advantage
Economic theory first advanced by Robert Torrens and David Ricardo that analyzes international trade in terms of differences in relative opportunity costs.

The theory suggests that countries should specialize in the goods they can produce most efficiently rather than trying for self-sufficiency and argues strongly in favour of free international trade.

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▪ economic theory
      economic theory, first developed by 19th-century English economist David Ricardo (Ricardo, David), that attributed the cause and benefits of international trade to the differences among countries in the relative opportunity costs (costs in terms of other goods given up) of producing the same commodities. In Ricardo's theory, which was based on the labour theory of value (in effect, making labour the only factor of production), the fact that one country could produce everything more efficiently than another was not an argument against international trade.

      In a simplified example involving two countries and two goods, if country A must give up three units of good x for every unit of good y produced, and country B must give up only two units of good x for every unit of good y, both countries would benefit if country B specialized in the production of y and country A specialized in the production of x. B could then exchange one unit of y for between two and three units of x (before trade, for only two units of x), and A could receive between one-third and one-half unit of y (before trade, only one-third unit of y) for every unit of x. This is true even though B may be absolutely less efficient than A in the production of both commodities.

      The theory of comparative advantage provides a strong argument in favour of free trade and specialization among countries. The issue becomes much more complex, however, as the theory's simplifying assumptions—a single factor of production, a given stock of resources, full employment, and a balanced exchange of goods—are replaced by more-realistic parameters.

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Universalium. 2010.

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