数实融合驱动城市减霾降碳的作用机制及空间溢出效应研究OACHSSCD

This study utilizes panel data from 283 Chinese cities spanning the years 2011 to 2023 to construct a measure of the integration of the digital economy(DE)and the real economy(RE)(IDERE)through patent classification analysis.We analyze the effects of this integration on haze reduction and carbon mitigation employing two-way fixed-effects and spatial econometric models.The findings indicate that IDERE significantly contributes to the reduction of both urban haze pollution and carbon dioxide emissions,illustrating a strong positive impact on both haze reduction and carbon mitigation.These results remain robust across a series of sensitivity tests.Mechanistic analysis reveals that IDERE enhances cities' capabilities for haze and carbon reduction by decreasing total energy consumption and intensity,while simultaneously promoting both the quantity and quality of green innovation and increasing investments in environmental protection.Further analysis uncovers significant spatial spillover effects,facilitating coordinated governance in adjacent regions.These effects are particularly pronounced in cities characterized by higher levels of coordinated development,stronger public oversight,and proximity to provincial capitals.Consequently,it is recommended that governments deepen the implementation of IDERE,adopt differentiated promotion strategies,and establish regional data flow channels to enhance cross-city collaboration,thereby fostering a synergistic approach to emissions reduction.