碳减排“双试点”政策能否发挥“减污降碳试验田”效能

Whether the Carbon Emissions Reduction Policy“Double Pilot”Can Exert the Effectiveness of the“Experimental Fields for Reducing Pollution and Carbon Emissions”

碳交易政策和低碳城市试点政策作为两项典型的碳减排试点政策,对减污降碳是否具有政策叠加效应?本文基于2006—2020年中国279个地级市面板数据,运用多期双重差分模型,从政策协同、目标协同的视角探究碳减排政策对城市减污降碳的影响。结果表明:①碳减排“双试点”政策对减污降碳具有明显的协同效应,政策实施时间越长,减排效应越强;②“双试点”政策通过创新效应和减源效应实现减污降碳协同;③西部地区、非资源型城市、非老工业基地和发达城市实施“双试点”政策,减污降碳效果更好;④两个“单试点”政策都能促进减污降碳,二者相比,碳交易政策的降碳效果更好,低碳城市试点政策的减污效应更优。“双试点”比“单试点”政策对减污降碳更有效,先成为低碳城市试点再实施碳交易政策的“双试点”城市减污降碳效果更明显。本文研究可为碳减排政策的实施提供参考和一定支撑。

Do the carbon trading policy and low-carbon city policy,as two typical carbon emissions reduction pilot policies,have a policy overlay effect on reducing pollution and carbon emissions?The multi-period difference-in-differences(DID)model was used to explore the policy effect of carbon emissions reduction policies on reducing pollution and carbon emissions from the perspectives of policy synergy and target synergy,basing on the panel data of 279 cities in China from 2006 to 2020.The results show that the dual pilot policy has an obvious synergistic effect on reducing pollution and carbon emissions.The longer the policy is implemented,the stronger the emissions reduction effect is.The dual pilot policy reduces pollution and carbon emissions by the innovation effect and source reduction effect.The implementation of dual pilot policy in western regions,non-resource-based cities,non-old industrial bases and developed cities has achieved better effect on reducing pollution and carbon emissions.Both single pilot policies can promote to reduce pollution and carbon emissions.Comparison between two policies,the carbon trading policy plays better effect on carbon emissions reduction,and the low carbon city pilot policy plays better effect on pollution reduction.The double pilot policy is more effective than the single pilot policy in reducing pollution and carbon.The double pilot cities that first becomes the low carbon city pilot and then implements the carbon trading policy have stronger effect on reducing pollution and carbon.It provides a reference for implementing carbon emissions reduction policies.