长江经济带土地绿色利用效率区域差异及动态演进OA

Urban land green use efficiency is a comprehensive indicator that balances economic output and environmental benefits,and it holds significant practical im-portance for the coordinated advancement of ecological protection and high-quality development in the Yangtze River Economic Belt.Based on panel data from 108 pre-fecture-level and above cities in the Yangtze River Economic Belt spanning from 2012 to 2023,this study employs the non-desired output super-efficiency SBM mod-el to measure urban land green use efficiency.Additionally,it utilizes Dagum Gini coefficient decomposition,kernel density estimation,and Markov chain methods to examine the regional differences,dynamic evolution,and spatial transfer character-istics across three major geographical zones.The research findings are as follows:In terms of temporal trends,the Yangtze River Economic Belt as a whole exhibits a fluctuating upward trend,with the downstream region experiencing significant growth in the later stages,becoming the leading region in efficiency.Although the upstream region has a higher average value,there are still cities with low efficiency.In terms of regional differences,the overall gap continues to narrow,with super-variable density replacing inter-regional differences as the primary source of overall variation,and the overlap of efficiency distributions among regions intensifies.The internal differences are greatest in the upstream region,while the middle reaches are relatively balanced but show signs of internal differentiation in the later stages.In terms of dynamic evolution,efficiency transfer is primarily of adjacent types,with leapfrog improvements being challenging,and high-efficiency cities exhibiting a Matthew effect.Spatial proximity significantly promotes the upward transition of intermediate efficiency cities,but has a limited spillover effect on low-efficiency cit-ies,and the spatial spillover effect exhibits heterogeneity.Based on these findings,policy recommendations are proposed from five aspects:differentiated regional pol-icies,coordinated development of urban agglomerations,cross-regional linkage mechanisms,support for cities during the transition period,and reform of the green fiscal system.