absolute advantage african economic community balance of payments balance of trade balanced trade capital account closer economic relations common market for eastern and southern africa common external tariff commonwealth of independent states comparative advantage competition competition policy complete economic integration current account customs and economic union of central africa east african community economic community of central african states economic community of west african states economic and monetary community of central africa economic and monetary union economic efficiency economic integration eurasian economic community fair trade foreign exchange reserves free trade free trade area free trade zone import quota import substitution industrialization international monetary fund international trade centre international trade israel liechtenstein list of free trade agreements list of international trade topics mercantilism net capital outflow palestinian territories policy preferential trading area protectionism saarland southern african customs union southern african development community switzerland trade barrier trade bloc trade creation trade diversion trade justice trade pact west african economic and monetary union world bank group world trade organization zollverein