不同规模城市土地利用效率的时空演变及收敛性研究

On Spatial-Temporal Evolution and Convergence of Land Use Efficiency of Cities in Different Scales

针对不同规模城市在经济发展过程中的土地利用情况及发展差距问题,运用Super-SBM模型、空间自相关及空间收敛性方法,对2008—2019年不同规模城市土地利用效率及其收敛性开展研究。结果表明:(1)全国、大城市和小城市土地利用效率呈现出上升的趋势,特大城市和中等城市出现小幅度的下降,且土地利用效率并不存在严格的规模等级递增效应;(2)空间相关性结果表明,研究区域土地利用效率的空间集聚效应在增强;(3)各规模城市土地利用效率均表现出较明显的β收敛,考虑空间因素及政府干预、经济发展等控制变量有利于促进收敛速度的提高。研究结果可为制定差异化的土地利用调控政策提供参考,以缩小经济发展差距,实现共同富裕。

Aiming at the problems of land use and development gap in the process of economic development of cities of different sizes,this paper used Super-SBM model,spatial autocorrelation method and spatial convergence method to study the land use efficiency and convergence of these cities from 2008 to 2019.The results indicated that:(1)The land use efficiency of big cities and small cities showed an upward trend,while the Megalopolis and medium-sized cities saw a small decrease in this aspect.At the same time,the efficiency wouldn’t be increased as the scale of the city was enlarged;(2)The spatial correlation results showed that the spatial agglomeration effect of land use efficiency was increasing in the study area;(3)The urban land use efficiency of cities varying in scale displayed obviousβconvergence.Considering the spatial factors,government intervention,economic development and other control variables could accelerate the speed of convergence.As such,the results can be used as a reference for formulating differentiated land use regulation policies to narrow the economic development gap and achieve common prosperity.