| As a large economic province in China,Shandong Province ranks third in the country in terms of GDP and belongs to an efficiency-oriented province.Energy use efficiency,technological level,and economic development level are relatively high,and material life is relatively abundant.However,the accelerated economic development has also produced environmental pollution that threatens people’s health.According to the report of "the level of ecological civilization in urban areas of China",the ecological civilization index(ECI)of Shandong Province is 0.73,ranking 11 th in 30 provinces and cities,with the ecological efficiency ranking 8th and the environment ranking 16 th.How to actively improve the quality of the ecological environment and gradually meet people’s needs for a better life while maintaining a high level of ecological efficiency is the top priority for Shandong Province to break through the bottleneck of development and achieve green sustainable development.In the process of resource and environment utilization,the problems such as increasing risks and uncertainties,increasing economic and welfare losses gradually appear and show a tendency of aggravation.Based on the research paradigm of strong sustainable development,a municipal green development evaluation system is constructed,which includes three dimensions of resource consumption,environmental pollution,and welfare levels.The PCA-Super-SBM model is used to comprehensively measure the ecological welfare performance levels of various cities in Shandong from2000 to 2017,and calculate the Theil Index.And σ convergence and absolute βconvergence are used to study the regional differences in Shandong Province,and an empirical study on the influencing factors of urban ecological welfare performance is conducted by constructing a Tobit model.The research finds:(1)From the perspective of development status,the eight cities of Qingdao,Heze,Linyi,Weihai,Jining,Weifang,Yantai,and Jinan are at the frontier of efficiency,and the remaining cities are in a state of inefficient DEA.Judging from the above,Shandong belongs to the development model of “high welfare and high consumption”,and it is in a continuous trend.(2)From the perspective of development differences,the differences in ecological welfare performance among cities in ShandongProvince have shown a downward trend in fluctuations,and intra-regional differences are the main reasons for the overall differences;each city has a trend of σ convergence and absolute β convergence,but there is volatility and unstability.In addition,the eastern urban area clusters are severely differentiated.The central and western urban area clusters are convergent.(3)In terms of influencing factors,there is an inverted U-shaped relationship between economic scale and ecological welfare performance,while environmental regulation significantly promotes ecological welfare performance.Therefore,the scale of the economy should be moderately controlled,and environmental regulations should be strengthened.In addition,cities such as Qingdao and Yantai should give full play to the role of leadership and radiation to promote coordinated economic,ecological and social development. |