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

摘要： 省际交界地区一直是区域经济发展中矛盾和问题较为突出的地区，囿于地区之间的行政壁垒，形成了区域发展的“洼地”。本文从行政壁垒阻碍区域市场一体化的角度，利用县级面板数据和省际市场分割指数，分析行政区划边界分割统一市场对区域经济造成的影响。研究发现：省际边界对省际交界地区的经济发展水平存在负面影响，且随着市场分割程度的提升而加剧。进一步地，行政区划边界分割统一市场，不利于交界地区产业集中度、专业化水平的提升，制约交界地区的经济发展水平。本文的研究结果表明，加快形成全国统一市场是推动省际交界地区发展的关键所在。

关键词: 行政区划边界, 市场分割, 全国统一市场