1. The Pattern of International Trade and Factor Flows App. 1. Aggregate Indices of Trade Overlap 2. The Instruments and Environment of Trade Policy 3. The Ricardian Framework 4. The Factor Abundance Model App. 1. The Transformation Curve 5. Trade Policy App. 1. Measures of Welfare Change App. 2. Deriving Cross Price Elasticities of Demand 6. Factor Specificity, Mobility and Unemployment 7. Higher Dimensional Issues 8. Empirical Tests of the Factor Abundance Model 9. Imperfect Competition 10. Trade Policy in Imperfectly Competitive Markets 11. Multinational Production 12. Economic Integration 13. Exchange Rates and International Trade 14. Growth and International Trade App. Data Methods and Sources.