AP Microeconomics 2.9: International Trade and Policy
Use world prices to analyze imports and exports, then evaluate how tariffs and quotas change domestic market outcomes and surplus.
- Syllabus
- Effective Fall 2025
- Course
- AP Microeconomics
Use world prices to analyze imports and exports, then evaluate how tariffs and quotas change domestic market outcomes and surplus.
The graph provided shows the market for rice in the country of Rushland.

Suppose that instead of the price floor, Rushland engages in international trade and the
world price of rice is $5 per bushel.
Will Rushland export or import rice? Explain using numbers from the graph.
| C(i) / Point 3 | Rushland will export rice: at the world price of $5, domestic quantity supplied is 80 bushels, greater than quantity demanded of 50, leaving a 30-bushel surplus for export. | 1 point |
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Calculate the domestic consumer surplus when Rushland engages in international trade.
Show your work.
| C(ii) / Point 4 | Calculate domestic consumer surplus as125:1/2×(10 −5)×50=125. | 1 point |
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Calculate the total revenue that Rushland's farmers will earn at the world price. Show
your work.
| C(iii) / Point 5 | Calculate total revenue as400:worldprice×quantitysold=5 × 80 = $400. | 1 point |
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