The course focuses on the theory of international trade. The most important topics covered are: - Patterns of trade and specialization (from the classical models --- Ricardo and Heckscher-Ohlin --- to the more recent models of monopolistic competition) - Gains from trade - Effects of international trade on income distribution - Economic geography and regional specialization - Trade policies - WTO and trade agreements Along the way, several important real world problems will be discussed, such as the effects of offshoring on wages, the relation between trade and migration, the tension between multilateralism and regionalism, and the effect of trade liberalization on income inequality.