长江经济带工业集聚对水环境污染的影响——基于空间计量与门槛效应的检验

IMPACTS OF INDUSTRIAL CLUSTERING ON WATER ENVIRONMENTAL POLLUTION IN YANGTZE RIVER ECONOMIC ZONE BASED ON SPATIAL METERING AND THRESHOLD EFFECT TEST

经济发展与生态环境动态良性循环已经成为社会经济发展的重要议题。为实现长江经济带高质量发展,以2007—2018年长江经济带11个省市为样本,采用空间计量和面板门槛模型考察工业集聚与水环境污染之间的关系。研究表明:长江经济带各省市水环境污染具有显著的空间自相关性;长江经济带工业集聚水平和水环境污染表现出先降低后增强的"U"型变化特征,说明工业集聚水平对水环境污染的影响存在一个阈值;长江经济带工业集聚产生的规模效应和结构效应对水环境污染存在显著的双门槛效应,在不同的工业集聚水平下,规模效应和结构效应表现出不同的外部性特征;工业集聚产生的技术溢出效应对水环境污染的影响同样具有显著的双门槛作用;随着各地区工业集聚水平的提高,技术溢出效应对水环境污染的减排作用表现出先强后弱的趋势。

A coordinated interaction between economy and eco-environment has become a vital topic of social economy.In order to reach high-quality development of Yangtze river economic zone,this paper uses spatial metering and panel threshold model to study the relation of industrial clustering with water pollution in 11 provinces(cities)in Yangtze river economic zone from 2007 to 2018.Such water environmental pollution has significant spatial autocorrelation.Impacts of industrial clustering on water environmental pollution in Yangtze river economic zone show a U-shaped curve,indicating existence of threshold in industrial pollution over water environmental pollution.Scale effect and structural effect of industrial clustering in Yangtze river economic zone have a striking double threshold effect on water environmental pollution with their exterior characteristics varying with industrial clustering levels,so does technical overflow effect,which will show a strong-to-weak trend on water environmental pollution as industrial clustering level grows.