Suppose that Greece and Sweden both produce beer and cheese. Greece's opportunity cost of producing a pound of cheese is 4 barrels of beer while Sweden's opportunity cost of producing a pound of cheese is 10 barrels of beer. By comparing the opportunity cost of producing cheese in the two countries, you can tell that has a comparative advantage in the production of cheese and has a comparative advantage in the production of beer. Suppose that Greece and Sweden consider trading cheese and beer with each other. Greece can gain from specialization and trade as long as it receives more than of beer for each pound of cheese it exports to Sweden. Similarly, Sweden can gain from trade as long as it receives more than of cheese for each barrel of beer it exports to Greece. Based on your answer to the last question, which of the following prices of trade (that is, price of cheese in terms of beer) would allow both Sweden and Greece to gain from trade? a. 1 barrel of oil per pound of cheese
b. 6 barrels of oil per pound of cheese
c. 18 barrels of oil per pound of cheese
d. 3 barrels of oil per pound of cheese