Chapter 1. Introduction --Part I The Gains from Trade under Non-standard Assumptions --Chapter 2. The Rise and Fall of Normative Trade Theory --Chapter 3. Deconstruct the Graham's Paradox --Chapter 4. Welfare Effects of Trade Liberalization and Coordinate Domestic Sales Tax Reforms under International Oligopoly --Part II Normative and Welfare Economics under Gossenian Assumptions --Chapter 5. Normative Trade Theory under Gossenian Assumptions --Chapter 6. Time Allocation under Autarky and Free Trade in the Presence of Time-consuming Consumption --Chapter 7. A General Equilibrium Model in Which Consumption Takes Time --Part III Selected Issues in Trade Policy -- Chapter 8. The Effects of Tourism Promotion on Unemployment and Welfare in the Presence of Environmental Protection and Agricultural Subsidy --Chapter 9. International Migration via Two Different Types of Midstream Countries --Chapter 10. On the Incentive for a Self-interested Policymaker to Mimic the Behavior of a Social-welfare Maximizer -- Part IV Tranfer Policy --Chapter 11. The Rise and Fall of Political Economy --Chapter 12. Domestic Income Transfer in a Dual Economy --Chapter 13. Foreign Aid: Mixed Strategy Equilibria --Part V Positive Trade Theory --Chapter 14. A Geometric Proof of Complete Specialization in a Three-by-three Ricardian World Economy.