The principle of comparative cost advantage was propounded by

The principle of comparative cost advantage was propounded by David Ricardo, an English economist who lived in the 19th century. The principle of comparative cost advantage states that countries can benefit from specializing in the production of goods and services in which they have a lower opportunity cost, and then trading with other countries. Opportunity cost is the cost of giving up one thing to get something else. In other words, it is the value of the next best alternative that is foregone. For example, suppose that Country A can produce both wheat and cloth, but it is more efficient at producing wheat than cloth, while Country B is more efficient at producing cloth than wheat. If Country A specializes in producing wheat and trades some of it with Country B for cloth, and Country B specializes in producing cloth and trades some of it with Country A for wheat, both countries can benefit from the trade. This is because Country A can produce more wheat by specializing in it and trading for cloth, and Country B can produce more cloth by specializing in it and trading for wheat. The principle of comparative cost advantage is based on the idea of gains from trade, which means that both countries can be better off by trading with each other even if one country is more efficient at producing all goods than the other.