| 摘要: |
| 数字基础设施建设为城市土地绿色利用效率提供了条件。 以三批次开展的“宽带中国”示范
城市建设为准自然实验,采用 2004—2021 年中国 283 个城市的面板数据,通过空间杜宾双重差分模型和
空间中介效应模型对数字基础设施建设影响城市土地绿色利用效率的机制与空间溢出效应进行实证检
验。 结果表明:试点城市的数字基础设施建设对土地绿色利用效率具有显著的本地赋能效应和空间溢出
效应,且空间溢出效应大于本地赋能效应,向邻近城市溢出的“政策红利”对于非试点城市的作用大于试
点城市;数字基础设施建设通过增加绿色技术存量、提升政府监管水平赋能本城市和邻近城市的土地绿
色利用效率;数字基础设施建设对城市土地绿色利用效率的赋能效应在资源配置效率低、地形起伏度小、
交通基础设施水平低的城市影响更显著。 因此,提出要提高政府对绿色技术创新的支持力度、构建土地
绿色利用的多元主体协同监管模式、因地制宜推进城市数字基础设施建设等对策建议。 研究成果为加强
数字中国建设和促进城市土地利用模式绿色转型提供了参考。 |
| 关键词: 土地绿色利用效率 数字基础设施建设 宽带中国 空间杜宾双重差分模型 |
| DOI： |
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| 基金项目: |
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| The Influence Mechanism and Spatial Spillover Effect of Digital InfrastructureConstruction on Urban Land Green Use Efficiency |
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ZHAO Huaping, WANG Haoyu, ZHAO Yunyu
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| Abstract: |
| Digital infrastructure construction provides conditions for the green utilization efficiency of urban
land. Taking the construction of the Broadband China demonstration cities carried out in three batches as a quasi-natural experiment, this paper uses the panel data of 283 Chinese cities from 2004 to 2021. Through the spatial Durbin difference-in-differences model and the spatial mediation effect model, an empirical test is conducted
on the mechanism and spatial spillover effect of digital infrastructure construction on the green utilization efficiency of urban land. The results show that the digital infrastructure construction in pilot cities has significant local empowering effects and spatial spillover effects on the green utilization efficiency of land, and the spatial
spillover effects are greater than the local empowering effects. The “policy dividends” spilling over to neighboring cities have a greater impact on non-pilot cities than on pilot cities; digital infrastructure construction empowers the green utilization efficiency of land in the local city and neighboring cities by increasing the stock of green
technology and enhancing the level of government supervision; the empowering effect of digital infrastructure
construction on the green utilization efficiency of urban land is more significant in cities with low resource allocation efficiency, small terrain undulations, and low levels of transportation infrastructure. Therefore, some countermeasures and suggestions are proposed, including improving government support for green technology innovation, constructing a multi-subject cooperative supervision model for green land use, and promoting digital infrastructure development in accordance with local conditions. The research results provide a reference for strengthening the construction of Digital China and promoting the green transformation of urban land use patterns. |
| Key words: green utilization efficiency of land digital infrastructure construction Broadband China spatial Durbin difference-in-differences model |
