Benefits of international trade: notes and practice questions
- This topic examines the advantages countries gain from engaging in international trade.
- Benefits include increased competition, leading to lower prices and greater consumer choice.
- Trade facilitates the acquisition of resources and generates foreign exchange earnings.
- It provides access to larger markets, allowing for economies of scale.
- International trade promotes more efficient resource allocation and production.
- Diagrams illustrate free trade effects, showing exports when world price is above domestic price.
- Diagrams also show imports when world price is below domestic price.
How it is examined
The SL version is a straightforward `explain` at 10 marks: SL Paper 1 TZ1 May 2025 Q3(a) asked why countries engage in international trade. The HL version supports Paper 3 calculations and a Paper 1 part (b) on whether comparative advantage still describes real trade. Paper 2 uses the international trade diagram as a 4-mark part, as TZ1 Q1(c) did for a tariff reduction on rice.
The benefits of international trade, including increased competition, lower prices, greater choice, acquisition of resources, more foreign exchange earnings, access to larger markets, economies of scale, more efficient resource allocation and more efficient production. (AO2, AO4)
- Absolute and comparative advantage: gains from trade, the sources of comparative advantage, and opportunity costs. (AO2, AO4)
- The limitations of the theory of comparative advantage. (AO3)
- Calculating, from a diagram, the quantity of exports, the quantity of imports, import expenditure and export revenue. (AO4)
- Calculating opportunity costs from a set of data in order to identify comparative advantage. (AO4)
Guiding questions
- Why do countries trade, and who gains?
Linking questions
- The world price line established here is the basis of every diagram in 4.2.
- Economies of scale as a benefit reappear as an advantage of trading blocs in 4.4.
- Export promotion in 4.10 rests on the gains from trade.
Practice questions
3 questions · 3 hardQuestion 1
HardPaper 1 · no calculator25 marks(a) Explain how poor infrastructure may act as a barrier to economic development.
(b) Using real-world examples, evaluate the view that trade liberalization is the most effective strategy for achieving economic development.
Think about the different types of infrastructure (e.g., transport, energy, communication, health, education). For each type, explain how its poor quality or absence could hinder a country's progress in improving living standards, not just increasing output.
Start by explaining the arguments in favour of trade liberalization. Then, for evaluation, consider the potential drawbacks. To address the 'most effective' part of the question, you must compare trade liberalization with other development strategies, such as improving infrastructure or education.
Question 2
HardPaper 1 · no calculator25 marks(a) Explain how high levels of economic inequality may act as a barrier to economic growth.
(b) Using real-world examples, evaluate the view that trade liberalization is the most effective strategy for achieving economic development.
Think about the various channels through which the distribution of income can affect a country's overall economic performance. Consider the impact on human capital, social stability, and aggregate demand.
Consider the arguments for and against trade liberalization as a development strategy. To evaluate whether it is the 'most effective', you should compare it with other potential strategies, such as interventionist or other market-based policies.
Question 3
HardPaper 1 · no calculator25 marks(a) Explain two arguments in favour of trade protection, and analyse the effects of an import tariff on an economy.
(b) Using real-world examples, discuss the view that adopting a policy of free trade is the most effective way for a country to achieve economic development.
Start by defining trade protection. Then, choose two distinct reasons why a government might restrict trade (e.g., protecting new industries, national security). For the second part, draw a standard tariff diagram and use it to explain the impact on consumers, producers, the government, and overall economic welfare.
Structure your answer as a debate. First, present the arguments for free trade as a driver of economic development (think comparative advantage, efficiency, economies of scale). Then, present the counter-arguments, which are essentially the arguments for protectionism in the context of development (e.g., the infant industry argument). Use real-world examples of countries or regions to support both sides. Conclude with a balanced judgment on whether free trade is the 'most effective' way.
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Where marks are lost
- No real-world example, or a stated one. An answer that names a country and stops cannot reach the top two bands.
- One-sided argument. Balance is an explicit axis. A student who argues only that a policy works is capped at 9 out of 15 on that axis alone.
- Diagram present but not explained. The diagram bullet escalates across three bands: included, included and explained, included and fully explained. A diagram dropped into an answer without prose that refers to it sits at 5 to 6 on a 10-mark part.
