Which economic principle explains why a country should specialize in producing goods for which it has the lowest opportunity cost relative to other countries?

• A. Absolute Advantage
• B. Specialization
• C. Trade
• D. Comparative Advantage

Answer: (D)

The idea being tested is how nations gain from producing the goods for which they sacrifice the least relative to other countries. This is called comparative advantage. It means each country examines the opportunity cost of making each good—what other goods must be given up to produce one more unit. If a country faces a smaller opportunity cost for a particular good than its trading partners, it should specialize in that good. When each country focuses on what it has the lowest relative cost for, overall production increases, and trade lets both sides enjoy more of both goods than if they tried to produce everything themselves.

For example, if Country A sacrifices less of another good to produce wheat than Country B does, and Country B sacrifices less of that other good to produce cloth than Country A does, each should specialize in its respective lower-cost good and then trade. Absolute advantages or the mere idea of specialization alone don’t explain why trade raises living standards; it’s the different relative costs that drive gains from trade.