Equilibrium in International Trade: A Diagrammatic Analysis / Kenen, Peter B. -- On the Geometry of Welfare Economics: A Suggested … Diagrammatic Treatment of Some Basic Propositions / Kenen, Peter B. -- A Note on Tariff Changes and World Welfare / Kenen, Peter B …. -- Migration, the Terms of Trade, and Economic Welfare in the Source Country / Kenen, Peter B. -- II. International Monetary Theory …