长江经济带生态福利绩效的区域差异与空间收敛

Regional Differences and Spatial Convergence of Ecological Welfare Performance in Yangtze River Economic Belt

利用非意合产出超效率SBM模型测度了2004—2018年长江经济带生态福利绩效,运用Dagum基尼系数分解法揭示了长江经济带上中下游区域生态福利绩效的差异及来源,并构建δ收敛和β收敛模型检验了长江经济带上中下游区域生态福利绩效的收敛性。研究发现:(1)2004—2018年长江经济带生态福利绩效呈现下游最大、中游次之、上游最小的阶梯式分布格局。(2)长江经济带上中下游区域生态福利绩效的空间异质性特征突出,区域间差距是生态福利绩效区域总体差距产生的主要根源。(3)长江经济带整体、上中下游的生态福利绩效均存在δ收敛和绝对β收敛,在考虑环境规制、外商投资水平、技术水平、经济发展水平、产业结构等影响因素后,生态福利绩效的条件β收敛速度快于绝对β收敛速度。

This paper uses the Super efficiency SBM model for undesirable output to measure the ecological welfare performance of the Yangtze River economic belt from 2004 to 2018.The Dagum Gini coefficient method is used to reveal the sources of regional differences in Ecological Welfare performance in the upper,middle and lower reaches of the Yangtze River economic belt.Theδconvergence and theβconvergence of the model are tested to verify the convergence of the eco-welfare performance in the upper and middle reaches of the Yangtze River economic belt.The results showed that:(1)From 2004 to 2018,the ecological welfare performance of the Yangtze River Economic Belt showed a ladder distribution pattern of the largest downstream,the second in the middle reaches and the smallest in the upper reaches.(2)The spatial heterogeneity of Ecological Welfare performance in the upper,middle and lower reaches of the Yangtze River economic belt is prominent,and regional gap is the main source of regional overall gap.(3)There areδconvergence and absoluteβconvergence in the whole Yangtze River economic belt,the upper reaches,the middle reaches and the lower reaches of the Yangtze River economic belt.After considering the environmental regulation,the level of foreign investment,the level of technology,the level of economic development and the industrial structure,the conditionalβconvergence rate of the ecological welfare performance is faster than the absoluteβconvergence rate.