A Non-Nested Test of Separability for Flexible Functional Forms
提出一种灵活的可分离函数形式，允许聚合函数逼近任意精度，比传统参数限制更灵活，并用非嵌套框架检验可分离性，以多产品超越对数成本函数的投入产出可分离性为例展示。
This paper develops a separable functional form in which all the relevant aggregator functions are modeled.to the desired degree of approximation. This leads to separable structures that are more flexible than those implied by parametric restrictions of flexible functional forms. Tests of separability can then be accomplished in a nonnested framework. This approach is illustrated with an application to input-output separability for a multiproduct translog cost function using a robust likelihood ratio testing procedure. Copyright 1992 by MIT Press.