中国城市蔓延的空间差异及收敛性分析——基于地级市面板数据的实证检验

Analysis on Spatial Differences and Spatial Convergence of Urban Sprawl in China——An Empirical Test Based on Panel Data of Prefectural Cities

文章基于DMSP/OLS夜间灯光数据测度了1994-2013年全国259个地级市的城市蔓延指数,并进一步分析了中国城市蔓延的区域差异以及空间收敛性。结果表明,1994-2013年中国城市蔓延程度总体上有所下降,但依然存在明显的空间差异,相比较而言,东部区域城市蔓延程度较低,且城市规模越大,蔓延程度越低;1994-2013年中国城市蔓延空间差异呈现上升趋势,组内差异是影响城市蔓延空间差异的主要贡献因素,其中从分区域来看,东部区域贡献率最高,东北部区域最小;中国城市蔓延在空间互动下存在条件β收敛,从分区域看,中部区域的收敛速度最快,东部区域收敛速度最慢。

Based on DMSP/OLS nighttime lighting data,this paper measures the urban sprawl index of 259 prefecture-level cities in China from 1994 to 2013,and further analyzes the regional differences and spatial convergence of urban sprawl in China.The results suggested that:During 1994-2013,the degree of urban sprawl in China has generally declined,but there are still obvious spatial differences.In comparison,the degree of urban sprawl in the eastern region is relatively low,and the larger the scale of the city,the lower the spread.The spatial differences in urban sprawl in China showed an upward trend from 1994 to 2013.The intra-group differences were the main contributors to the spatial differences in urban sprawl.Among them,in terms of sub-regions,the contribution rate of the eastern region is the highest,and that of the northeast region is the smallest.China’s urban sprawl has conditionalβconvergence under spatial interaction,and the spatial convergence speed is faster than that without considering spatial influence factors;in the subregion,the convergence rate of the central region is the fastest,and the convergence rate of the eastern region is the slowest.