关键词: 商品市场分割 , 价格法 , 行政区经济

Abstract: A unified domestic market plays an important role in regional specialization and contributes to scale effect. This paper uses price method to calculate the degree of commodity market segmentation for each city from 2001 to 2015. This paper finds that: (1) Except for shortterm increase of commodity market segmentation in 2008—2009, the degree
of commodity market segmentation has declined during 2001—2015. (2) There is a clear gap in the process of commodity market integration among regions. The level of commodity market integration in the southeastern region is higher than that in the western region. The level of commodity market segmentation at national level is greater than that at the local level. (3) Interregional competition encourages local governments to intervene in market, and thus aggravates commodity market segmentation; while better economic development conditions and market size expansion reduces vicious competition between regions and promotes regional commodity market integration. (4) Commodity market segmentation at city level shows a certain pattern due to the influence of administrative divisions: provincial boundaries hinder trade between cities and incur commodity market segmentation.

Key words: commodity market segmentation , price method , administrative zone economy