Unit Overview
International Trade
CIE A-Level EconomicsΒ· 5 min read π 12-15% of overall exam
1. Unit at a Glance
This unit follows a logical arc from core economic theory to real-world policy and global institutions. We start by building the foundational argument for free trade, using the concept of opportunity cost to explain how specialisation can make all trading countries better off.
Next, we examine how the gains from trade are distributed between countries via terms of trade, then explore the ongoing policy debate between free trade and protectionism. We finish by covering the global and regional institutions that shape modern trade flows: the World Trade Organization and regional trading blocs.
The unit is split into 6 connected sub-topics:
Absolute and comparative advantage
Introduces the core theories of specialisation and mutually beneficial trade between countries.
β β β± 10 min
Terms of trade
Explains how gains from trade are split between trading partners, including calculation of the terms of trade index.
β β β β± 8 min
Free trade vs protectionism
Evaluates the key economic arguments for and against protectionism and for free trade.
β β β β± 10 min
Types of protectionist policies
Covers the welfare and distributional effects of tariffs, quotas, subsidies and other trade barriers.
β β β± 9 min
World Trade Organization
Explains the structure, core principles and role of the WTO in global trade governance.
β β± 6 min
Trading blocs and trade integration
Analyses different types of regional trade integration and their effects on members and non-members.
β β β β β± 12 min
2. Common Pitfalls
Wrong move:
Confusing absolute advantage with comparative advantage when determining specialisation patterns
Why:
Absolute advantage compares total output, while comparative advantage relies on opportunity cost, which is the correct determinant of trade patterns
Correct move:
Always compare opportunity costs to identify which good a country should specialise in
Wrong move:
Claiming all protectionist policies are always economically harmful for all countries
Why:
Protectionism can have short-term benefits for domestic employment and strategic long-term benefits for developing economies
Correct move:
Use balanced evaluation to weigh the deadweight loss costs against any potential benefits of protectionism
Wrong move:
Treating all trading blocs as identical forms of integration
Why:
Different levels of integration have distinct features and different effects on trade and welfare
Correct move:
Memorise the key differences between free trade areas, customs unions and common markets
3. Quick Reference Cheatsheet
Concept | Key Rule / Formula |
|---|---|
Comparative Advantage | A country has comparative advantage if it has lower opportunity cost of production than its trading partner |
Terms of Trade Index | ext{ToT} = rac{ ext{Export Price Index}}{ ext{Import Price Index}} imes 100 |
Tariff Welfare Effect | Creates deadweight loss, benefits domestic producers, raises government revenue, harms consumers |
Quota vs Tariff | Quotas generate quota rent for importers; tariffs generate revenue for the government |
WTO Core Principle | Most-favoured nation: non-discrimination between all member trading partners |
Customs Union vs FTA | Customs unions have a common external tariff; free trade areas do not |
What's Next
Begin this unit with the core theory of comparative advantage, the foundation for all further analysis of trade policy and global trade institutions. Work through each sub-topic in order to build your understanding step by step. Once you complete all sub-topics in this unit, you can progress to the next unit on open macroeconomics covering balance of payments and exchange rates.