School of Business Administration, Northeastern University, Shenyang, 110189, China.
Environ Sci Pollut Res Int. 2022 Dec;29(57):86616-86633. doi: 10.1007/s11356-022-21833-3. Epub 2022 Jul 7.
In this study, the central environmental protection inspection (CEPI) policy is considered a quasi-natural experiment. Based on the data of 216 Chinese cities from 2008 to 2018, the influence of CEPI on green technology innovation (GTI) is empirically examined mainly using difference-in-differences (DIDs), propensity score matching DID and spatial DID methods. The results indicate that CEPI can effectively promote GTI. Regarding different types of GTI, CEPI mainly promoted utilitarian GTI. Regarding the mechanism, CEPI significantly promotes local GTI mainly through the increase of environmental protection expenditure and research and development investment. Considering the dynamic marginal effect, CEPI starts to significantly promote GTI in the second year after the policy implementation but exhibited no effects in the third year. The extended study shows that GTI effect of CEPI only occurs in small-medium cities and big cities. Furthermore, there is a certain beggar-thy-neighbor effect between inspected and uninspected cities. Finally, the spatial decomposition of CEPI effects shows that the inhibitory effect of CEPI on GTI mainly occurs in the neighboring uninspected cities, while CEPI has no evident inhibition on GTI in neighboring inspected cities.
在本研究中，中央环保督察（CEPI）政策被视为一项准自然实验。基于 2008 年至 2018 年 216 个中国城市的数据，主要采用双重差分（DID）、倾向得分匹配 DID 和空间 DID 方法，实证检验了 CEPI 对绿色技术创新（GTI）的影响。结果表明，CEPI 能有效促进 GTI。就不同类型的 GTI 而言，CEPI 主要促进了功利性 GTI。就作用机制而言，CEPI 主要通过增加环保支出和研发投入来显著促进当地 GTI。考虑到动态边际效应，CEPI 在政策实施后的第二年开始显著促进 GTI，但第三年没有效果。扩展研究表明，CEPI 对 GTI 的影响仅发生在中小城市和大城市。此外，被检查和未被检查的城市之间存在一定的“以邻为壑”效应。最后，CEPI 效应的空间分解表明，CEPI 对 GTI 的抑制作用主要发生在相邻的未检查城市，而 CEPI 对相邻的检查城市的 GTI 没有明显的抑制作用。
