On the Marginal Cost of Wastewater Services
分析了市政废水服务的边际成本，先解释废水服务特性，再定义边际成本并应用于假想系统，最后讨论废水收费设计。
The purpose of this paper is to analyze the marginal cost of municipal wastewater services. We begin by describing the nature of wastewater services. This is of importance, since the measurement of marginal cost is an activity which requires a specialized knowledge of the engineering and technology of the industry (Turvey, 1969). In the next section, we deal with the relevant definition and interpretation of marginal cost. We then apply our definition to the measurement of marginal cost for a hypothetical, but realistic, wastewater system. In the last section, we make some observations about the design of wastewater tariffs.