international trade, trade theory, trade policy, classical trade theories, mercantilism, theory of absolute advantage, theory of comparative advantage, factor-endowment theory, Heckscher-Ohlin Theory, modern theories of trade, product life cycle theory (Vernon), new trade theory (Krugman), theory of national competitive advantage (Porter), neo-mercantilist policy, product specialization, production efficiency, innovator-imitator theory, market saturation, outsourcing,