3) Refer to Figure 2-4. A movement from X to Y    13) ______ A) could occur because of an influx of immigrant labor. B) is the result of advancements in food production technology only, with no change in the technology for plastic production. C) is the result of advancements in plastic production technology only, with no change in food production technology. D) could be due to a change in consumers' tastes and preferences.

Review the numbers for Canada and Venezuela from Table 33.12 which describes how many barrels of oil and tons of lumber the workers can produce. Use these numbers to answer the rest of this question. Draw a production possibilities frontier for each country. Assume there are 100 workers in each country. Canadians and Venezuelans desire both oil and lumber. Canadians want at least 2,000 tons of lumber. Mark a point on their production possibilities where they can get at least 3,000 tons. Assume that the Canadians specialize completely because they figured out they have a comparative advantage in lumber. They are willing to give up 1,000 tons of lumber. How much oil should they ask for in return for this lumber to be as well off as they were with no trade? How much should they ask for if they want to gain from trading with Venezuela? Note: We can think of this ask as the relative price or trade price of lumber. Is the Canadian ask you identified in (b) also beneficial for Venezuelans? Use the production possibilities frontier graph for Venezuela to show that Venezuelans can gain from trade.

How does comparative advantage lead to gains from trade?