Knut Wicksell on Utility and Market Aggregation
探讨维克塞尔在1893年著作中提出的加总条件，指出杰文斯的“交易体”概念仅在假设相同线性边际效用函数时才有效，而维克塞尔更偏好瓦尔拉斯的总超额需求函数，并讨论了库尔诺问题及代表性主体在储蓄函数中的应用。
Knut Wicksell discussed in his 1893 Value, Capital, and Rent, as part of a critical comment on Launhardt and Jevons, conditions for consistent aggregation. He argued that Jevons's “trading body” concept was only valid if identical linear marginal utility functions (with ensuing parallel Engel lines for all individuals) could be assumed, which he regarded as unrealistic. Wicksell preferred Léon Walras's notion of market excess aggregate demand functions, which are functions of prices only. Such functions would not be affected by aggregation problems, if only disequilibrium transactions were assumed away. The article also addresses Wicksell's position concerning the so-called Cournot problem (that the general equilibrium system may not be able to provide precise numerical solutions), and his use of the notion of the representative agent in the formulation of the saving function.