产业转型升级示范区建设对城市土地绿色利用效率的影响研究

The Impact of Industrial Transformation and Upgrading Demonstration Zones on Urban Land Green Utilization Efficiency

研究目的:基于2006—2021年中国152个老工业和资源型城市的面板数据,将产业转型升级示范区建设作为准自然实验,探究该政策对城市土地绿色利用效率的影响。研究方法:超效率SBM模型,渐进双重差分模型。研究结果:(1)示范区的设立能够显著提升城市土地绿色利用效率,且这一结论在经过多轮稳健性检验后依然成立。同时,这一影响存在明显的推广效应。(2)机制检验表明,示范区建设能够通过产业集聚、环境规制与技术创新三条路径提升城市土地绿色利用效率。(3)异质性分析发现,示范区建设的城市土地绿色利用效率提升效应在老工业城市和集群式示范区中更为显著,在资源型城市与单一式示范区中相对较弱,在复合型城市中尚未显现。研究结论:应持续优化并推进示范区建设,加强政策扶持力度,积极引导产业集聚,强化环境规制与支持技术创新,因地制宜细化政策安排,探索多元化产业转型路径,合力推进城市土地绿色利用效率提升。

The purpose of this study is to systematically examine the impact of industrial transformation and upgrading demonstration zones on urban land green utilization efficiency based on panel data from 155 old industrial cities and resource-based cities in China from 2006 to 2021.The research methods are super efficient SBM model and asymptotic double difference model.The research results show that:1)the establishment of demonstration zones can significantly improve urban land green utilization efficiency,which still holds true after multiple rounds of robustness testing.Meanwhile,this impact has a significant promotional effect.2)The mechanism testing shows that the construction of demonstration zones can improve urban land green utilization efficiency through three paths,i.e.,industrial agglomeration,environmental regulation and technological innovation.3)Heterogeneity analysis suggests that the improvement effect of urban land green utilization efficiency in demonstration zone construction is more significant in old industrial cities and cluster demonstration zones,relatively weak in resource-based cities and single demonstration zones,and not evident in composite cities.In conclusion,it is necessary to promote the construction of demonstration zones,strengthen policy support,actively guide economic agglomeration,strengthen environmental regulations and support technological innovation,refine policy arrangements according to local conditions and to explore diversified industrial transformation paths,which can jointly promote urban land green utilization efficiency.