Who developed the theory of comparative advantage?

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The theory of comparative advantage was developed by David Ricardo in his book "Principles of Political Economy and Taxation" published in 1817. While Adam Smith discussed the concept of specialization and division of labor, it was Ricardo who first explained the benefits of trading between countries based on their relative efficiencies in producing goods. John Stuart Mill was another influential economist of the time, but he did not directly develop the theory of comparative advantage. Karl Marx, meanwhile, focused more on capitalist exploitation and the labor theory of value.

Who Developed the Theory of Comparative Advantage