关键词: 食品价格水平, 电商平台, 购买力平价, 空间相依

Abstract: Based on the two-step measurement framework of the World Bank International Comparison Program, this paper uses the price data of 106 homogeneous and comparable products in 29 cities collected from the e-commerce platform to calculate the food price level at the city level in China. The spatial distribution characteristics, interdependence patterns and influencing factors of the food price level have been studied in depth. It finds that there are significant differences in the overall food price level between cities. The price levels of fresh food vary greatly between cities, while the price levels of packaged food vary much less between cities. During 2001—2021, the food price levels between cities show a trend of convergence. Studies based on the spatial perspective show that food price level presents a certain effect of urban agglomeration. Compared with geographic spatial correlation, food price levels between cities show a stronger economic spatial correlation. Food price level of a city is largely determined by its level of economic development and affected by the spatial spillover of cities with similar development levels. The conclusions indicate that in order to effectively improve the accuracy of policy making related to minimum wage standard, basic living allowance, and income distribution, regional price level differences should be taken into consideration.

Key words: Food Price Level, E-commerce Platform, Purchasing Power Parity, Spatial Dependence