Using Exogenous Elasticities to Induce Factor Substitution in Input-Output Price Models
提出一种方法，允许投入产出价格模型的使用者通过设定弹性值来修改部分系数，以反映价格变化引起的替代效应。弹性值可来自外部研究或主观判断，并给出简化主观弹性设定的理性规则。
A device is presented that allows the user of any input-output price model to induce modifications in some selected coefficients in response to changes in prices. These modifications are induced by specifying the values of some elasticities, whenever they are defined. These values may come from other studies, from the user's own knowledge or beliefs about the situation, or from those of experts. If subjective elasticities are used, a simple rationality rule greatly reduces the task of determining their values when the substitution between two inputs or two groups of inputs is assumed to be a function of their prices only. This assumption does not prevent there being, in a second stage, substitution between these two inputs treated as a group and other inputs or groups of inputs.