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Foundational microeconomic theory — markets, market failure and trade protection.
Answer a question and the diagram shows you why.

Demand

Increases, decreases, expansions, contractions 20 questions

Supply

Increases, decreases, expansions, contractions 20 questions

Equilibrium

Market clearing, shortages, surpluses 20 questions

Price mechanism

Price ceilings, price floors, rationing 20 questions

Positive externalities

External benefits, MSB, under-provision 20 questions

Tariffs

Price, production, imports, government revenue 20 questions

Subsidies

Shifting supply, imports, cost to government 20 questions

Quotas

Price, imports, importer revenue, non-binding quotas 20 questions