Elasticities in AIDS Models
指出在近似线性几乎理想需求系统（LA/AIDS）中，现有计算需求弹性的方法在理论上都是错误的，并给出了正确的公式，同时展示了使用错误公式可能导致的偏差。
Abstract In the literature, a variety of approaches have been used to calculate demand elasticities in almost ideal demand system (AIDS) models of demand. It is common to estimate the linear approximate almost ideal demand system (LA/AIDS) instead of the AIDS. When the LA/AIDS is estimated, all of the previously reported approaches to compute elasticities are theoretically incorrect. This paper presents correct formulas for LA/AIDS elasticities and illustrates the potential errors from using incorrect computing formulas.