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金融研究  2021, Vol. 498 Issue (12): 20-37    
  绿色金融专辑 本期目录 | 过刊浏览 | 高级检索 |
我们为什么需要绿色金融?——从全球经验事实到基于经济增长框架的理论解释
文书洋, 张琳, 刘锡良
西南财经大学中国金融研究中心,四川成都 610000
Why Do We Need Green Finance? Global Empirical Facts and Theoretical Explanations in an Economic Growth Framework
WEN Shuyang, ZHANG Lin, LIU Xiliang
Institute of Chinese Financial Studies, Southwestern University of Finance and Economics
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摘要 当前,绿色金融备受关注,然而该领域的基础理论尚需进一步强化。根据经济学的一般原理,由于污染的外部性问题,环保的主要力量应当是公共部门而非金融系统。然而为何越来越多国家选择发展绿色金融?其背后的经济学原理是什么?深入探讨这些问题是有效制定政策、构建绿色金融理论体系的基础。本文基于跨国面板数据的分析表明,绿色金融对经济增长具有显著的促进效应,表现出与公共部门环保投入的显著差异。在此基础上,本文构建基于经济增长框架的绿色金融理论模型,对经验事实给出理论解释。模型证明:绿色金融的成本分摊与风险分担功能使其具有独特的长期增长效应,是经济发展必然选择;绿色金融政策与绿色财政政策的协调配合是实现高质量发展的有效手段。本文从理论层面回答了“为什么需要绿色金融”这一问题,为绿色金融的经济学理论发展和政策分析提供了可借鉴的框架。
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文书洋
张琳
刘锡良
关键词:  绿色金融  经济增长  高质量发展  政策配合    
Summary:  Green development is a must for human progress, and the role of finance in green development is receiving more attention. “Green finance” generally refers to financial products, markets and policies related to environmental protection and sustainable development. In academia, the concept of green finance is closely related to environmental and climate finance and overlaps sustainable finance and socially responsible investing (SRI). In the past two decades, the development of global green finance has significantly advanced, and green finance issues have received increasing attention. However, theoretical research in this field lags behind. Although the number and proportion of studies have grown rapidly,and the economic theory of green finance is weak. Scholars struggle to rigorously answer the fundamental question of why we need green finance. According to the general principles of economics, the externality of pollution indicates that the main force of environmental protection should be the public sector rather than the financial system. However, more and more countries are choosing green finance. What is the economic intuition behind this phenomenon? An in-depth discussion of these issues forms the basis for effective policymaking and the development of green finance theory.
This study uses data on listed companies worldwide to estimate the debt ratio of green enterprises in various countries as a proxy indicator of green finance. Then, combining that with fiscal expenditure data from the United Nations, we examine the changes in global green finance and government expenditures on environmental protection. The results show that in the past 20 years, total global government expenditures on environmental protection have slightly increased, but the ratio of this expenditure to GDP has a downward trend. Meanwhile, the scale and ratio of green finance to GDP have continued to increase, and the development level of green finance has been in line with the economy. Further cross-country panel data analysis shows that green finance effectively promotes long-term economic growth, showing obvious heterogeneity with green fiscal investment. On the basis of these findings, we ask whether green finance differs from traditional public finance in terms of economic principles?
This study builds a multisector general equilibrium growth model that includes residents, enterprises, financial sector and government. It depicts the dynamic relationship between green fiscal investment, green finance and economic growth and reproduces the abovementioned facts. The theoretical analysis shows that, firstly, green finance has advantages for long-term growth. It can mitigate the deficiency of public services subject to congestion and achieve high-quality economic development. Secondly, there is a scale threshold above which firms voluntarily choose to protect the environment by using green finance without government intervention. Subsidies for green credit can promote firms' green investment and enable the economy to reach a higher steady state. Thirdly, a combination of green financial and fiscal policies to guide fiscal investment in the initial stage of economic development and gradually strengthen the promotion of green finance in later stages can speed economic growth, achieve a higher steady-state capital stock level, and meet the goal of high-quality economic development. This study answers the question of why we need green finance from the economic theory perspective. It addresses the basic theoretical shortcomings in the field of green finance, providing basic theoretical support for the development of green finance and a useful analytical framework for further theoretical research on green finance.
This article also has implications for future research. For instance, the next important academic question to address is how green finance affects financial institutions. Although this article discusses the macroeconomic benefits of green finance, it does not explore whether financial institutions have inherent incentives to engage in green finance. There is some empirical evidence in the literature, but the theoretical basis of this problem is still unclear. Whether the implementation of green finance policies can be incentive compatible is an important direction for future research.
Keywords:  Green Finance    Economic Growth    High-quality Development    Policy Coordination
JEL分类号:  G20   O11   O13  
基金资助: * 本文得到国家社科基金重大项目(20&ZD081)、国家社会科学一般项目(20BJY255),以及教育部人文社会科学研究西部和边疆地区青年基金项目(21XJC790012)、西南财经大学中国特色现代金融理论平台的支持,感谢匿名审稿人的宝贵意见,文责自负。
通讯作者:  张琳,经济学博士,副教授,西南财经大学中国金融研究中心,E-mail:zhanglin29@swufe.edu.cn.   
作者简介:  文书洋,经济学博士,讲师,西南财经大学中国金融研究中心,E-mail:wensy@swufe.edu.cn.刘锡良,经济学博士,教授,西南财经大学中国金融研究中心,E-mail:liuxl@swufe.edu.cn.
引用本文:    
文书洋, 张琳, 刘锡良. 我们为什么需要绿色金融?——从全球经验事实到基于经济增长框架的理论解释[J]. 金融研究, 2021, 498(12): 20-37.
WEN Shuyang, ZHANG Lin, LIU Xiliang. Why Do We Need Green Finance? Global Empirical Facts and Theoretical Explanations in an Economic Growth Framework. Journal of Financial Research, 2021, 498(12): 20-37.
链接本文:  
http://www.jryj.org.cn/CN/  或          http://www.jryj.org.cn/CN/Y2021/V498/I12/20
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