经济集聚能否促进长江经济带工业绿色转型?

Can Economic Agglomeration Promote Green Industrial Transition in the Yangtze River Economic Belt?

长江经济带作为我国重要的经济发展区域,加快推动其工业绿色转型是践行“生态优先、绿色发展”理念的必由之路和关键抓手。基于2011—2020年长江经济带108个城市的面板数据,采用包含非期望产出的超效率SBM模型测算工业绿色转型水平,运用时空双固定效应的空间杜宾模型实证检验经济集聚对工业绿色转型的直接影响及空间溢出效应。研究发现:区域内经济集聚对工业绿色转型的影响呈倒“U”形非线性关系,当经济集聚处于合理范围内有助于促进本地区工业绿色转型,当经济集聚越过临界值后则会抑制本地区工业绿色转型,长江经济带大多数城市的经济集聚水平尚未达临界值。周边地区经济集聚对本地区工业绿色转型的空间溢出效应也呈倒“U”形非线性关系。长江经济带经济集聚与工业绿色转型均呈现高值与高值集聚、低值与低值集聚的正向空间相关性。为进一步提升长江经济带城市工业绿色发展能力,应在城市资源容量和环境容量允许的范围内,提升城市经济集聚能力,利用经济集聚的正外部性,推动工业绿色化发展。

As an important economic development zone in China,accelerating the green transition of industry in the Yangtze River Economic Belt is the only way and the key to implementing ecological priority and green development.Based on the panel data of 108 cities in the Yangtze River Economic Belt from 2011 to 2020,the super-efficiency SBM model including unexpected output is used to measure the level of green industrial transition,and the spatio-temporal fixed spatial Durbin model is used to empirically test the direct impact and spatial spillover effect of economic agglomeration on green industrial transition.It is found that there is an inverted U-shaped nonlinear relationship in the impact of regional economic agglomeration on green industrial transition,in which economic agglomeration within a reasonable range helps promote green industrial transition in the region,while when economic agglomeration exceeds the critical value,it will inhibit the green industrial transition in the region.The economic agglomeration level of most cities in the Yangtze River Economic Belt is below the critical value.The spatial spillover effect of economic agglomeration in the surrounding areas on the green industrial transition of the region also shows an inverted U-shaped relationship.Economic agglomeration and green industrial transition in the Yangtze River Economic Belt both show a positive spatial correlation between high value and high value agglomeration,and low value and low value agglomeration.In order to further enhance the green industrial development capacity of cities in the Yangtze River Economic Belt,it is suggested to enhance the urban economic agglomeration capacity within the permissible range of urban resource capacity and environmental capacity,and make use of the positive externalities of economic agglomeration to promote the green industrial development.