International Trade, Specialisation and Protection
Explaining gains from trade, comparative advantage, competitiveness and the effects of tariffs, quotas, subsidies, standards and trade agreements.
How to study A-level Economics
Define the issue and affected agents, choose an appropriate model, build the causal chain with data, then evaluate assumptions, trade-offs and alternatives before judging.
Core concepts
Concept 1
Comparative advantage depends on relative opportunity cost and can support mutually beneficial specialisation and exchange.
Exam cue: Calculate opportunity costs before identifying comparative advantage.
Concept 2
Trade changes prices, output, employment, consumer choice and the distribution of gains within and between economies.
Exam cue: Separate total gains from trade from how those gains are distributed.
Concept 3
Protection can pursue strategic, revenue, security or adjustment aims while creating costs, retaliation and resource misallocation.
Exam cue: Evaluate protection using duration, targeting, retaliation, enforcement and realistic alternatives.
Risk pitfalls and guardrails
Confusing absolute advantage with comparative advantage.
Guardrail: Do not substitute a memorised diagram or generic advantage until you have identified the determinant, mechanism, affected agents and time horizon.
Assuming free trade benefits every worker and firm immediately.
Guardrail: Do not substitute a memorised diagram or generic advantage until you have identified the determinant, mechanism, affected agents and time horizon.
Treating a tariff as if foreign producers necessarily bear the whole burden.
Guardrail: Do not substitute a memorised diagram or generic advantage until you have identified the determinant, mechanism, affected agents and time horizon.
Memory anchors
Absolute Advantage
Absolute advantage means producing more output from the same resources.
Comparative Advantage
Comparative advantage means producing at a lower opportunity cost.
Tariff
A tariff is a tax on imported goods or services.
Quota
A quota directly limits the permitted quantity or value of trade.
Trade Agreement
A trade agreement sets negotiated rules for access, treatment and cooperation between economies.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
What is absolute advantage?
Country A gives up fewer units of another good than Country B when producing wheat. Which trade concept describes Country A’s position?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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