Suppose France and the U.S. both specialize in production according to their respective comparative advantages ..........
France produces wine and the U.S. produces cheese; thus, both countries now "specialize" in production.
Now, production information should look like this:
France --- 10 wine, 0 cheese
U.S. --- 0 wine, 20 cheese
After specialization, total world output equals 30 units of both goods (instead of 27); thus, clearly a gain in production!
