Estimating Elasticities with the Linear Approximate Almost Ideal Demand System: Some Monte Carlo Results
通过蒙特卡洛实验评估了线性近似几乎理想需求系统中四种弹性公式的准确性，发现两种常用公式误差大，另两种则相当准确。
The almost ideal demand system (AIDS) model has many desirable theoretical properties but usually it is estimated using a linear approximation. The quality of the approximation to the true AIDS depends on the parameters and the collinearity among the exogenous price variables. In the literature, four alternative formulas have been used to compute elasticities of a demand system that is assumed to be of the AIDS form using parameters estimated in the linear approximate AIDS. Month Carlo experiments indicate that two of those four alternatives, as typically applied, are highly inaccurate but the other two are quite accurate. Copyright 1994 by MIT Press.