The impact of broadband China and low-carbon pilot on China's urban carbon emissions

In the context of global environmental governance, a reduction in carbon emissions (CE) is critical for sustainable development. This article delves into the correlation between China's dual pilot policy (DPP), comprising the broadband China city pilot (BCCP) and low-carbon city pilot (LCCP), and CE using panel data for 281 Chinese cities from 2003 to 2020 and a staggered difference-in-differences approach. Our results demonstrate that the DPP contributes to reducing CE. In this regard, we find that DPP exerts a more significant negative effect on CE when the LCCP precedes the BCCP, compared to the BCCP preceding the LCCP. Heterogeneity analysis shows that urban location and resource utilization patterns influence DPP's impact on CE reduction. Moreover, green technology innovation and industrial agglomeration account for the relationship between DPP and CE. The DPP additionally exhibits positive economic performance, benefiting urban sustainability. Taken together, these findings reveal how the DPP negatively affects CE, providing key evidence for regional green economy advancement.