数字经济与城市碳排放绩效:作用机制与空间效应

Digital Economy and Urban Carbon Emission Performance:Mechanism and Spatial Effect

文章基于数字经济对碳排放绩效的理论机理,构建数字经济和碳排放绩效的评价指标,实证检验数字经济对中国城市碳排放绩效的作用机制与空间效应。结果表明:数字经济整体发展水平逐步提高,且区域间差距显著;碳排放绩效呈现波动上升的变动趋势,且碳排放绩效水平整体偏低;经过一系列稳健性检验后发现,数字经济可以显著促进城市碳排放绩效提升,作用机制检验表明,数字经济主要是通过绿色技术创新、产业结构优化和绿色金融发展对碳排放绩效产生积极影响;异质性分析表明,数字经济能够显著改善东部地区城市、人力资本充裕城市、高城镇化水平城市以及低财政压力城市的碳排放绩效;空间效应分析表明,数字经济发展可有效改善本地城市和相邻城市的碳排放绩效。

The article builds upon the theoretical mechanisms linking the digital economy to carbon emission efficiency and establishing evaluation criteria for both digital economy and carbon emission performance.It empirically investigates the role and spatial effects of the digital economy on urban carbon emission efficiency in China.Key findings are as follows.The digital economy’s overall development level is steadily increasing,but with notable disparities between regions.Carbon emission efficiency demonstrates a fluctuating upward trend,yet remains generally low.Robustness tests confirm that the digital economy significantly enhances urban carbon emission efficiency.Mechanism analyses indicate that this is primarily achieved through advancements in green technology,the optimization of industrial structures and the growth of green finance.Heterogeneity analyses reveal that the digital economy notably improves carbon emission efficiency in eastern cities,areas with ample human capital,highly urbanized regions,and cities experiencing low fiscal pressure.Spatial analyses demonstrate that the development of the digital economy effectively enhances carbon emission efficiency both locally and in neighboring urban areas.These findings underscore the pivotal role of the digital economy in bolstering urban carbon emission efficiency through various mechanisms and spatial influences,emphasizing the importance of green technologies and structural optimizations in achieving environmental sustainability goals.