Using Income Classes to Estimate Consumption Parameters for Food Policy Analysis
提出一种按收入阶层估计消费参数的方法，结合市场数据的价格弹性和家庭调查的收入弹性，计算牙买加主要农产品的分阶层价格弹性，并证明使用加总参数会导致政策分析偏差。
This paper develops an approach to estimate consumption parameters by income classes. It combines price elasticities estimated from aggregated market data and income-class-specific income elasticities derived from household expenditure surveys using Slutsky relationships to calculate income-class-specific price elasticities. The approach was applied to estimate income-class-specific price elasticities for major agricultural commodities consumed in Jamaica. The importance of these elasticities for food policy analysis is demonstrated by using an econometric simulation model framework. Food policy analysis based on aggregate consumption parameters may introduce bias into the results. This is particularly true in the case of developing countries where disparity between low- and high-income groups is very high.