Evaluating the Linearized Almost Ideal Demand System
指出线性化几乎理想需求系统（LAIDS）中，因使用Stone价格指数导致测量误差，使得SUR估计不一致且无法构造一致的IV估计；同时发现Green-Alston弹性并不优于传统公式，并通过蒙特卡洛模拟验证了这些问题。
Abstract Linearizing the Almost Ideal Demand System (LAIDS) by recourse to the Stone share weighted price index is common practice. Two issues are addressed here. First, scrutiny of the errors‐in‐variables implications of the linearization reveals that, not only is the SUR estimator inconsistent, but a consistent IV estimator cannot be constructed. Second, some alternatives to the Green‐Alston elasticities specifically designed for the LAIDS model are developed, but neither these nor the Green‐Alston elasticities are found to have any advantages over the conventional elasticity formulae. Some errors in the Green‐Alston (1990) paper are corrected. The inconsistency and elasticity issues are documented by a Monte Carlo investigation.