生态经济

在“双碳”目标引领下，协同推进降碳、减污、扩绿、增长发展是破解生态环境与经济发展矛盾的必然选择。论文将新能源示范城市试点政策视为一项准自然实验，基于2006—2023年我国279个地级及以上城市的面板数据，借助双重差分模型探析新能源示范城市试点政策对城市的降碳-减污-扩绿-增长协同效应及作用机制。研究显示，新能源示范城市试点政策显著促进城市的降碳-减污-扩绿-增长协同效应并在一系列稳健性检验后该结论仍成立。政策实施效果在东部地区、非资源型城市及环境规制强的城市更显著。进一步研究发现，新能源示范城市试点政策可通过推动绿色技术创新赋能城市降碳-减污-扩绿-增长协同效应。同时，产业结构高度化在新能源示范城市试点政策促进城市降碳-减污-扩绿-增长协同效应中具有正向调节作用，而财政压力呈现负向调节效应。扩展性分析表明，新能源示范城市试点政策对城市降碳-减污-扩绿-增长协同效应具有显著的正向空间溢出特征。建议持续推广新能源示范城市试点政策，合理扩大覆盖范围，因地制宜施策，精准推动城市降碳-减污-扩绿-增长协同发展。

Under the guidance of the dual carbon goals， promoting the coordinated development of carbon reduction， pollution reduction， green expansion， and economic growth is an inevitable choice to resolve the contradiction between ecological environment and economic development. This paper regards the pilot policy of new energy demonstration cities as a quasi-natural experiment， and based on the panel data of 279 prefecture-level and above cities in China from 2006 to 2023， uses the difference-in-differences model to explore the coordinated effect of the pilot policy of new energy demonstration cities on carbon reduction， pollution reduction， green expansion， and economic growth， as well as its mechanism. The research shows that the pilot policy of new energy demonstration cities significantly promotes the coordinated effect of carbon reduction-pollution reduction-green expansion-economic growth of cities， and this conclusion remains valid after a series of robustness tests. The policy implementation effect is more significant in the eastern region， non-resource-based cities， and cities with strong environmental regulations. Further research finds that the pilot policy of new energy demonstration cities can promote the coordinated effect of carbon reduction-pollution reduction-green expansion-economic growth of cities by promoting green technological innovation. At the same time， the industrial structure upgrading has a positive moderating effect on the coordinated effect of carbon reduction-pollution reduction-green expansion-economic growth promoted by the pilot policy of new energy demonstration cities， while fiscal pressure has a negative moderating effect. The extended analysis shows that the pilot policy of new energy demonstration cities has a significant positive spatial spillover effect on the coordinated effect of carbon reduction-pollution reduction-green expansion-economic growth of cities. It is suggested to continuously promote the pilot policy of new energy demonstration cities， reasonably expand the coverage， implement policies based on local conditions， and precisely promote the coordinated development of carbon reduction-pollution reduction-green expansion-economic growth of cities.