Two-stage efficiency evaluation of industrial water resources and the role of digital inclusive finance: insight from Yangtze River Delta

IF 5.7 3区 环境科学与生态学 Q1 WATER RESOURCES
Linjie Feng, Tingting Liu, Zhenjie Yang, Yi Shi, Hongxi Chen, Ka Leong Chan, Bin Chen
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Abstract

The Yangtze River Delta (YRD) occupies 2.1% of China's territory but accounts for 1/4 of its GDP. Boosting efficiency of industrial water resources in YRD will drastically decrease water pollution and resource constraints. The current paper employed Network Super-SBM and the Global Malmquist-Luenberger index to evaluate industrial water use efficiency and wastewater treatment efficiency of YRD’ cities. Furthermore, digital inclusive finance and green innovation are introduced to investigate the mechanisms underlying their influence on the overall industrial water resources efficiency. The empirical findings posts that: (1) there is still room to improve the overall efficiency, especially the water treatment efficiency; (2) the MI value of each stages in most samples is greater than 1, indicating that the water treatment efficiency and water use efficiency are improving. It is mainly driven by the improvement of the efficiency of the management; (3) there are substantial differences in water resource efficiency among metropolitan areas, with Nanjing-metropolitan areas and Hefei-metropolitan areas having higher water use efficiency and water treatment efficiency for both stages, while Hangzhou-metropolitan areas and Shanghai-metropolitan areas have lower water treatment efficiency. As shown by the Kernel density Estimation, the degree of efficiency dispersion within same metropolitan area is reducing; and (4) digital inclusive finance will boost overall efficiency and water treatment efficiency, with green innovation as a mediating factor. The findings herein offer compelling evidence that financial development increases the effectiveness of water resources, introduce fresh perspectives for the government to put forward water-related policies, and provide ideas for high-quality economy.

工业水资源两阶段效率评价与数字普惠金融的作用——来自长三角的洞察
长江三角洲(YRD)占中国领土的2.1%,但占中国GDP的1/4。提高长三角地区工业水资源的利用效率将大大减少水污染和资源约束。本文采用Network Super-SBM和Global Malmquist-Luenberger指数对长三角城市的工业用水效率和废水处理效率进行了评价。引入数字普惠金融和绿色创新,探讨其对工业水资源整体效率的影响机制。实证结果表明:(1)综合效率特别是水处理效率仍有提升空间;(2)大部分样品各阶段的MI值均大于1,说明水处理效率和水利用效率都在提高。主要是由管理效率的提高所驱动;(3)城市圈间水资源效率存在较大差异,南京都市圈和合肥都市圈在两个阶段的水利用效率和水处理效率均较高,而杭州都市圈和上海都市圈的水处理效率较低。核密度估算表明,同一都市圈内的效率分散程度在减小;(4)数字普惠金融将提高整体效率和水处理效率,其中绿色创新是中介因素。本文的研究结果为金融发展提高水资源的有效性提供了有力的证据,为政府制定与水有关的政策提供了新的视角,并为高质量经济提供了思路。
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来源期刊
Applied Water Science
Applied Water Science WATER RESOURCES-
CiteScore
9.90
自引率
3.60%
发文量
268
审稿时长
13 weeks
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