数字政府推动城市减污降碳扩绿增长协同发展研究OACHSSCD

The construction of digital government,an important component of the national governance system,has become an urgent is-sue to alleviate the acute tension between environmental protection and economic growth in China.This paper,based on the panel data from 269 prefecture-level cities over the period from 2012 to 2022,investigates the impact effect,functional mechanism and modera-ting factors through which digital government promotes the synergistic development of pollution reduction,carbon mitigation,greening expansion and economic growth.The results reveal that digital government has effectively enhanced the multi-objective synergy in ur-ban development.The underlying mechanisms operate through improvements in governmental environmental governance capacity,the promotion of corporate digital transformation and increased public participation in environmental protection.Moderating effect tests indi-cate that the institutional environment quality and promotion incentives both positively moderate the effectiveness of digital government in fostering synergistic development.The heterogeneity test shows that the facilitating effects of digital government on environmental governance are more pronounced in non-resource-based cities,cities with concentrated digital industries,and cities with lower levels of market competition.Further analysis suggests that the synergistic governance efficacy exhibits significant short-term dynamics and spatial diffusion characteristics.Based on these findings,this study proposes policy recommendations,including deepening multi-actor collaboration,fostering a favorable digital environment,implementing differentiated digital governance strategies,and establishing long-term evaluation mechanisms and cross-domain collaborative governance frameworks.