中国四类资源型城市绿色转型效率测度、时空演变与区域差异

Measurement,spatial-temporal evolution and regional differences in the green transformation efficiency of four types of resource-based cities in China

加快资源型城市绿色转型效率提升是新时期实现中国资源型城市经济高质量发展的必由之路。基于中国110个资源型城市面板数据,综合采用Super-SBM模型、核密度估计以及Dagum基尼系数等方法对资源型城市绿色转型效率的时空演变特征与区域差异情况进行研究。结果表明:(1)总体资源型城市绿色转型效率呈波动式下降趋势,研究期内其年均值呈现下降-上升-下降-上升的波动式发展态势,整体下降幅度不大,但高效率区域的城市数量显著下降;(2)各类资源型绿色转型效率具有相似演变趋势,大小表现为再生型>成熟型>成长型>衰退型;(3)资源型城市绿色转型效率的区域差异在研究期内呈现增长趋势,区域内差异大小表现为成熟型>成长型>再生型>衰退型,超变密度与区域内差异是造成区域差异的主要原因。

Enhancing resource cities′green transformation at a faster pace to boost productivity is the path to achieving superior economic growth in the new era.Based on the panel data of 110 resource cities in China,this paper investigated the spatial-temporal evolution characteristics and regional differences of the green transition efficiency of resource cities by comprehensively adopting the Super-SBM model,kernel density estimation,and Dagum′s Gini coefficient.The results indicated that:①Overall,resource-based cities′green transition efficiency showed a fluctuating downward trend,and its annual average showed a fluctuating development of decline-rise-decline-rise during the study period.The overall decline was not significant,but the number of cities in high-efficiency areas had decreased significantly.②The efficiency of each type of resource-based green transition had a similar evolutionary trend,with the size of regeneration>maturity>growth>decline.③Regional differences in the efficiency of green transition in resource-based cities showed a growing trend during the study period,and the size of intra-regional differences manifested itself in the form of mature>growing>regenerating>declining,with hypervariable density and intra-regional differences being the main reasons for the regional differences.