On the Geometry of Welfare Economics:
提出一种改进的盒状图，用于完整分析生产变化对福利的影响，并应用于国际贸易理论中的某些命题。
I. The Bowley-Edgeworth box diagram can be used to describe an exchange but not a production equilibrium, 426. — II. A modified box diagram that allows a complete and explicit treatment of the welfare implications of changes in production, 429. — III. Relation of modified box diagram to some recent work in welfare economics, 433. — IV. Application of modified box diagram to analysis of certain propositions in the theory of international trade, 439.