Promoting harmonious interaction between human beings and the ecological environment has become a key issue for achieving sustainable development. Given the cross-regional mobility of resources and production activities, a single region cannot merely rely on its own efforts to balance economic expansion and carbon reduction. In this context, Digital finance can play a key role in improving information connectivity, facilitating green capital allocation, and reducing transaction costs for cross-regional low-carbon collaboration. Against this background, this study introduces and quantifies regional coordinated emission reduction potential by integrating economic ties, geographical proximity, and interregional carbon emissions from a network perspective. By using the panel fixed effect model, the study explored how digital finance shapes this potential and identified the energy-related carbon consumption structure as a transmission mechanism. Findings reveal that the carbon emission spillover effect is most powerful under the combined influence of economic similarity and geographical proximity. Digital finance significantly enhances the potential for regional coordinated emission reduction, and the effect is even stronger in provinces with lower potential for coordinated emission reduction or weaker fiscal decentralization. The level of digitalization and the depth of usage have a greater influence than the breadth of coverage. In addition, the energy-related transmission channels exhibit clear heterogeneity. The coal-related emission channel provides relatively stronger evidence, whereas the gas-related channel shows a countervailing effect.
Zhang et al. (Mon,) studied this question.