关键词: 行政区划边界, 市场分割, 全国统一市场

Abstract: The border region of provinces has always been the area where the contradictions are more prominent in the regional coordinated development Subject to administrative barriers between regions，the border region of provinces forms “lowlying land” in regional development From the perspective of administrative barriers hindering market integration，this article uses the retail price index of commodities to calculate the market segmentation between neighboring provinces and explores the impact of administrative divisions on the regional economy This article finds that：the border effect has a negative impact on the economic development of the border area，and it intensifies as the degree of market segmentation increases Evidence from manufacturing companies shows that the border effect is not conducive to the improvement of industrial concentration and specialization in the border area，and it is difficult to form the favorable conditions required by the agglomeration economy，which further restricts the economic development of the border area The research in this paper suggests that accelerating the formation of a unified national market is the key to promoting the economic development of border regions of provinces

Key words: borders of administrative divisions, market segmentation, a unified national market