Quantity Aggregation in Consumer Demand Analysis when Physical Quantities are Observed
指出Deaton（1986-1988）的横截面数据弹性估计方法隐含使用了希克斯复合商品定理，据此可严格定义加总复合数量。对科特迪瓦和美国的比较表明，当商品异质性显著时，使用物理数量度量会严重误导弹性估计。
A method for estimating price and income elasticities from cross section data devised by Deaton (1986, 1987, 1988) makes implicit use of the Hicks' composite commodity theorem. Recognition of this fact allows theoretically rigorous definition of aggregate composite quantities. A comparison of elasticities of Hicks' composite with elasticities of simple physical quantity measures for the Ivory Coast and the United States demonstrates that use of physical quantity measures can be severely misleading when commodity heterogeneity is substantial. Copyright 1990 by MIT Press.