Calculating Rural‐Urban Food Price Differentials from Unit Values in Household Expenditure Surveys: A Comparison with Existing Methods and A New Procedure
提出一种利用住户调查数据计算印度城乡购买力平价的新方法，通过引入商品特定平价概念和考虑人口偏好差异，揭示在偏好异质国家中纳入空间差异的必要性。
While purchasing power parity (PPP) between countries has received a great deal of attention, PPP calculations within countries have received less attention. The idea that one unit of currency has the same purchasing power in all regions in large countries is false. This paper addresses this limitation by proposing a methodology for calculating rural‐urban PPP in India. The paper introduces a concept of item‐specific PPP that exploits the analogy with an item‐specific equivalence scale. The methodology relies on demographically‐varying preferences to estimate PPP. The results underline the need to incorporate spatial differences in PPP calculations in countries with heterogeneous preferences.