CONVEXITY CONSTRAINTS IN PUBLIC GOODS THEORY
指出公共品理论中的凸性约束会引发私人品理论中不会出现的问题，强调公共品维度的关键性，并区分消费单位与生产单位，澄清了标准文献中的模糊之处。
Convexity constraints create problems in the theory of public goods that need not arise in the theory of private goods. This paper discusses these problems, which have not been fully recognized in the standard literature. The dimensionality of public goods becomes critical. A distinction must be made between consumption units, that enter as arguments in utility functions, and production units, which enter production functions, and which are directly purchased by the demanders. Standard convexity properties defined on consumption units need not imply convexity properties on production units, given standard properties of utility and production functions. The ambiguities are clarified by reference to the orthodox literature in public goods theory.