Autarky, imports and exports, who wins and who loses when a country opens up, and what a tariff or an import quota does to price, quantity and surplus
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These bands say whether you have trade and tariffs down — they are not an AP score prediction. The exam covers every unit, counts free response for a third of the grade, and gives you no feedback until it is over. Treat a strong result here as one topic secured, not as a score.