Although the model describing the theory is commonly referred to as the “Ricardian model,” the original description of the idea (see Chapter 2: The Ricardian Theory of Comparative Advantage, Section 2...Although the model describing the theory is commonly referred to as the “Ricardian model,” the original description of the idea (see Chapter 2: The Ricardian Theory of Comparative Advantage, Section 2.12: Appendix- Robert Torrens on Comparative Advantage) can be found in the 1815 Essay on the External Corn TradeSee Robert Torrens, Essay on the External Corn Trade (London: J.