智慧城市建设对绿色技术创新的影响—基于地级市面板数据的实证研究

实现高质量发展与兑现碳中和承诺，有待于绿色技术的进一步创新。针对这一目标，智慧城市建设提供了一条可行的途径。为了检验智慧城市对绿色技术创新的影响，本文基于2006-2018年287个地级市的面板数据，采用双重差分和倾向得分匹配相结合（PSM-DID）的方法进行实证研究，发现智慧城市建设能够显著促进绿色技术创新。机制检验表明，智慧城市建设主要通过财政科技支出的提高和产业结构的升级促进绿色技术创新。异质性检验发现，智慧城市建设在低金融发展水平、低外向型经济水平和高人力资本水平下，对绿色技术创新的促进作用更为显著。本文对于促进绿色技术创新、营造良好生态环境和推动智慧城市试点建设具有借鉴意义。

Research on the Impact of Smart City Construction on Eco-innovation

The goal of achieving high-quality development and meeting carbon neutrality commitments requires further innovation in green technologies. In response to this goal, the smart city policy offers a viable pathway. To test the impact of the construction of smart cities on eco-innovation, this paper conducts an empirical study based on panel data of 287 cities from 2006-2018, using a combination of double difference and propensity score matching (PSM-DID) methods, and finds that smart city construction can significantly promote eco-innovation. The mechanism test shows that smart city construction promotes eco-innovation mainly through the increase of financial expenditure on science and technology and the upgrading of industrial structure. Heterogeneity tests found that smart city construction promoted green technological innovation more significantly under area with low environmental regulation intensity, low financial development level, low export-oriented economy level and high human capital level. This paper has implications for promoting eco-innovation, creating a good ecological environment, and promoting the pilot construction of smart cities.