摘要
本文基于我国2006—2016年城市面板数据,以长三角城市群扩容为例,使用双重差分法实证研究了城市群扩容对绿色经济效率的影响。研究发现:城市群扩容对城市群原有城市的绿色经济效率有显著提升作用,对新进城市的绿色经济效率无显著作用,稳健性检验表明该结论是可靠的。机制检验表明:扩容未影响原有城市的技术效率,但通过提高市场一体化水平来促进原有城市技术进步,进而提升原有城市绿色经济效率;扩容通过降低功能专业化水平来提高新进城市技术效率,通过提高市场一体化水平来促进新进城市技术进步并降低其技术效率,由于技术进步效应和技术效率降低效应相互抵消,扩容未影响到新进城市的绿色经济效率。此外,扩容对原有城市中的大城市、高创新能力及高经济发展水平城市的绿色经济效率有更大提升作用。
Based on the panel data of Chinese cities from 2006 to 2016 and taking the enlargement of Urban Cluster of Yangtze River Delta as an example, the impact of enlargement of urban cluster on green economic efficiency was studied by using the differences-in-differences method. The results show that enlargement of the Yangtze River Delta urban cluster has a significant effect on the green economic efficiency of the original cities in the urban cluster,but has no significant effect on the green economic efficiency of the new cities. The robustness test shows that the conclusion is reliable. Mechanism test shows that enlargement of urban cluster does not affect the technical efficiency of the original cities,but promotes the technological progress of the original cities by improving the level of market integration,and then improves the green economic efficiency of the original cities. Enlargement of urban cluster improve the technical efficiency of new cities by reducing the level of functional specialization. Enlargement of urban cluster promote the technological progress and reduce the technical efficiency of new cities by improving the level of market integration. Because the effect of technological progress and technological efficiency reduction cancel each other,enlargement of urban cluster does not affect the green economic efficiency of new cities in urban cluster. In addition,the enlargement has a greater effect on the green economy efficiency of the original cities with large scale,high innovation capacity and high economic development level.
作者
杨航英
强永昌
Yang Hangying;Qiang Yongchang(School of Economics,Fudan University,Shanghai 200433,China)
出处
《技术经济》
CSSCI
北大核心
2022年第2期75-85,共11页
Journal of Technology Economics
基金
国家教育部基地重大项目“外商直接投资与产业结构、收入分配的相关性研究”(14JJD790025)。
关键词
城市群扩容
绿色经济效率
双重差分
功能专业化
市场一体化
enlargement of urban cluster
green economic efficiency
differences-in-differences
functional specialization
market integration
