Imposing Local Curvature Conditions in Flexible Demand Systems
通过重新参数化基本超越对数和对数超越对数需求系统，并利用Slutsky矩阵必须为负半定但不能为负定的性质，将一种保持局部曲率特性的简单方法应用于这些模型及其他需求系统。
Abstract By reparameterizing the basic translog and the log translog demand systems and exploiting the fact that the Slutsky matrix must be negative semidefinite but cannot be negative definite, it is shown that a recently proposed simple procedure to maintain locally the curvature property of consumer theory can be applied to these popular translog models as well. The proposed procedure can also be applied to other demand-system specifications such as, for example, the nonseparable generalized linear expenditure system. KEY WORDS: Cholesky factorizationNegative semidefinitenessSlutsky matrix