低碳城市试点对企业绿色技术创新的影响  

The effect of low-carbon pilot cities on the green technology innovation of enterprises

作　　者：熊广勤[1] 石大千 李美娜 Xiong Guangqin;Shi Daqian;Li Meina(School of Finance,Zhongnan University of Economics and Law,Wuhan 430073,Hubei,China;Institute of Quality Development Strategy,Wuahan University,Wuhan 430072,Hubei,China)

机构地区：[1]中南财经政法大学金融学院,湖北武汉430073 [2]武汉大学质量发展战略研究院,湖北武汉430072

出　　处：《科研管理》2020年第12期93-102,共10页Science Research Management

基　　金：国家自然科学基金项目:“中国收入—幸福悖论的理论解释及实证检验”(71773144,2018.01—2021.12)。

摘　　要：本文以中国低碳试点城市政策为准自然实验,构造三重差分模型,检验了低碳试点城市政策对试点城市内高碳排放企业绿色技术创新的影响。研究发现:(1)低碳试点城市政策并不是高碳排放企业绿色发展的绊脚石,低碳试点城市政策显著提高了试点城市内高碳排放企业的绿色技术创新水平,从而验证了"波特假说"成立。(2)倾向得分匹配—三重差分(PSM-DDD)模型估计结果与三重差分模型估计结论一致,且一系列稳健性检验都证明了本文结论的稳健性。(3)异质性分析表明,低碳试点城市政策显著提高了东、西部试点城市内高碳排放企业绿色技术创新,对中部地区试点城市内的企业没有显著影响。低碳试点政策显著提高了非国有高碳排放企业绿色技术创新,但对国有高碳排放企业没有显著影响。本文丰富了对低碳试点城市政策效果评估的相关研究,补充了"波特假说"相关领域的研究。The low-carbon pilot policy has played an important role when China make efforts to achieve the carbon emission reduction targets. In order to study whether the construction of low-carbon pilot policy can induce enterprises to carry out green technology innovation, this paper uses China′s low-carbon pilot policy as a quasi-natural experiment, constructs a difference-in-difference-in-differences(DDD) model that "before-after the implementation of the low-carbon pilot policy;if or not in the pilot city;if or not belongs to the high carbon emission industry". Since the third batch of low-carbon pilot cities was officially announced in 2017, the duration of the policy is not enough for us to evaluate its effect, so we take the pilot cities announced in 2010 and 2012 as the main research object. The number of enterprises authorized green patents and micro-economic characteristics of listed companies in China from 2006 to 2017 were used to evaluate the effect of the low-carbon pilot policy on enterprises′ green technology innovation, and explore whether the Porter hypothesis based on China′s low-carbon pilot policy is valid.The results show that:(1) The implementation of the low-carbon pilot policy has significantly improved the green technology innovation level of high-carbon emission enterprises in the pilot cities. The policy has increased the proportion of green patents of high-carbon emission enterprises in the pilot area by 0.929%, and the coefficient is significant at the 5% significance level. Furthermore, the low-carbon pilot policy has a positive effect on both green invention patent and green utility model patent of high-carbon emission enterprises in the pilot area, but has a more significant effect on the green utility model patent. The conclusion of the DDD estimation confirms the validity of the Porter hypothesis based on the low-carbon pilot policy in China.(2)In order to solve the problem of sample selection bias caused by the difference in initial conditions between the treat group and the contr

关 键 词：低碳城市 企业绿色技术创新 三重差分 

分 类 号：F062.2[经济管理—政治经济学]