This document defines and explains several key terms related to international trade and economic integration between nations. It provides Spanish definitions for terms like preferential agreements, tariffs, economic openness, trade balance, bilateralism, internal trade, costs, market studies, factor endowments, investment, trade liberalization, free trade, import licenses, common markets, mercantilism, state monopolies, rules of origin, tariff preferences, economic unions, absolute advantage, comparative advantage, and free trade areas. The document is from a Colombian university and appears to provide foundational concepts for students studying international economics and trade.