Identification and Estimation of Equivalence Scales under Weak Separability
证明大多数将人口变量纳入可分模型的方法可表示为Barten等价尺度的推广形式，该尺度依赖于商品组合和人口变量，能提高需求系统估计效率并克服Muellbauer的不可识别问题。
This paper shows that most methods of incorporating demographic variation into separable models can be represented in a form that is identical to Barten equivalence scales, except that the scales themselves depend on the exact mix of goods that comprise each group, as well as on demographic variables. This generalization of Barten scales is shown to be more plausible than ordinary scales, can be used to increase the efficiency of demand system estimation, and can overcome Muellbauer's under-identification result for cross-sectional estimation of equivalence scales.