A Composite Cost Function for Multiproduct Firms With An Application to Economies of Scope in Banking
提出一种复合成本函数，结合二次产出结构与对数二次投入价格结构，用于分析多产品企业的范围经济等性质，并通过银行业数据验证其优势。
The composite cost function the authors propose combines a quadratic output structure with a log-quadratic input price structure and is well suited for examining economies of scope, subadditivity, and other important properties of multiproduct firms. To compare the composite model with an appropriate set of alternative functional forms, they develop a parsimonious--but general--specification that nests the standard translog cost function, the generalized translog cost function, a separable quadratic cost function, and the composite cost function. An application to economies of scope in banking confirms the advantages of the composite model. Copyright 1992 by MIT Press.