ECSENOMICS Free Trade Allows the World to move to Its Production-Possibility Frontier T-111 igure 15-4 Fi 500 X E(After trade) B ( Before trade) 500 Food McGraw-Hilllrwin CopyrightC 2001 The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill/Irwin Copyright © 2001 The McGraw-Hill Companies, Inc. All rights reserved. Free Trade Allows the World to Move to Its Production-Possibility Frontier T-111 Figure 15-4