What determines a country’s gains from trade? A The difference between the trading price and the country’s natural resources. B The difference between the trading price and the country’s opportunity cost. C The difference between the trading price and the country’s population. D The difference between the trading price and the country’s GDP.
The correct answer and explanation is:
Correct Answer: B. The difference between the trading price and the country’s opportunity cost.
A country’s gains from trade are determined by the difference between the international trading price and the country’s opportunity cost of producing the same good or service domestically. This concept is rooted in the principle of comparative advantage, which explains how countries benefit by specializing in the production of goods they can produce at a lower opportunity cost than other countries.
Opportunity cost refers to the value of the next best alternative that must be given up when choosing one option over another. If a country can produce a product at a lower opportunity cost than its trading partner, it has a comparative advantage in that product. When countries trade based on comparative advantage, they can both consume more than they would in isolation.
For example, suppose Country A can produce either 10 units of wheat or 5 units of cloth with the same resources, and Country B can produce either 6 units of wheat or 6 units of cloth. Country A’s opportunity cost of 1 unit of cloth is 2 units of wheat, while Country B’s opportunity cost of 1 unit of cloth is 1 unit of wheat. Since Country B gives up less wheat to produce cloth, it has a comparative advantage in cloth. If they agree to trade at a rate where 1 cloth equals 1.5 wheat, both countries benefit: Country A gets cloth for less than its internal cost, and Country B gets wheat for less than it would cost to produce it itself.
Thus, the gains from trade come from this difference between internal opportunity costs and the agreed-upon trading price. Natural resources, population size, or total GDP can influence trade patterns, but they do not directly determine the gains. It is the opportunity cost comparison that forms the foundation of beneficial trade.