France and england both produce wine and cloth with constant opportunity costs. france can produce 150 barrels of wine if it produces no cloth or 100 bolts of cloth if it produces no wine. england can produce 50 barrels of wine if it produces no cloth or 150 bolts of cloth if it produces no wine. when international trade takes place, each country specializes completely in the production of the good in which it has a comparative advantage: 1 barrel of wine exchanges for 1 bolt of cloth and france exports 50 units of wine. we can conclude that france produces units of wine and units of cloth and that france consumes units of wine and units of cloth.