This course examines the impact of trade policies using the theory of international trade. The first part of the course is devoted to a survey of theory, beginning with traditional competitive trade theory and concluding with more recent advances of the theory of trade in imperfectly competitive markets. The next section examines the economic impact of unilateral trade policy instruments such as tariffs, export subsidies and anti-dumping provisions. The effect of multilateral trading arrangements such as the WTO and NAFTA are examined next. The final section is devoted to the application of the theory to the international movement of factors of production with an emphasis on immigration.