Relating Elasticities to Changes in Demand
指定了一类将商品需求与价格联系起来的方程，并证明给定这类方程，可以在任意价格变化下将交叉弹性之比与需求的相对变化联系起来。
Abstract This article specifies a class of equations relating the demand for a good to prices. It is shown that given this class of equations, one can relate the ratio of cross-elasticities to relative changes in demand, given arbitrary price changes. KEY WORDS: Cross-elasticityApplied demand analysisEstimation