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International Trade & Comparative Advantage
Global Trade and Comparative Advantage
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International trade is the exchange of goods and services across national borders, such as the United States selling airplanes or buying coffee. It matters because trade affects prices, jobs, businesses, taxes, and the choices available to consumers. In civics, trade is also about government decisions, since Congress and the president help shape trade laws, tariffs, and agreements. Understanding trade helps students see how the U.S. economy connects to the world.
Comparative advantage explains why countries often benefit by specializing in what they can produce at a lower opportunity cost. A country does not need to be the best at making everything to gain from trade. For example, the United States may specialize in high-tech products, agriculture, or services while trading with countries that produce textiles, electronics, or raw materials efficiently. Government policies can encourage trade, restrict trade, or try to protect certain industries.
Key Facts
- International trade means buying and selling goods and services between countries.
- Exports are goods and services a country sells to other countries.
- Imports are goods and services a country buys from other countries.
- Comparative advantage means producing a good at a lower opportunity cost than another producer.
- Opportunity cost = value of the next best choice given up.
- Tariff cost to buyer = world price + tariff, if the tariff is passed on to consumers.
Vocabulary
- Comparative advantage
- The ability to produce a good or service at a lower opportunity cost than another producer.
- Opportunity cost
- The value of the best alternative that is given up when a choice is made.
- Tariff
- A tax placed on imported goods, often used to raise revenue or protect domestic industries.
- Free trade agreement
- A deal between countries to reduce trade barriers such as tariffs, quotas, and import rules.
- Trade barrier
- A government rule or cost that makes international trade harder or more expensive.
Common Mistakes to Avoid
- Confusing absolute advantage with comparative advantage is wrong because being able to produce more does not always mean producing at a lower opportunity cost.
- Assuming imports are always bad is wrong because imports can lower prices, increase choices, and support jobs in transportation, retail, and related industries.
- Ignoring opportunity cost is wrong because trade decisions depend on what a country gives up to make one product instead of another.
- Thinking tariffs only hurt foreign countries is wrong because tariffs often raise prices for consumers and businesses in the country that uses them.
Practice Questions
- 1 Country A can produce either 40 tons of wheat or 20 computers in one day. Country B can produce either 30 tons of wheat or 30 computers in one day. What is the opportunity cost of 1 computer in each country, measured in tons of wheat?
- 2 A pair of shoes costs $50 before a tariff. The government adds a 20% tariff, and the full tariff is passed on to buyers. What is the new price of the shoes?
- 3 The United States can produce both airplanes and wheat efficiently, but it has a lower opportunity cost in airplanes than many countries. Explain why the United States might export airplanes and import some other goods even if it could make those goods itself.