Climate policies that achieved major emission reductions: Global evidence from two decades

• 成果类型: Article
• 署名作者: Stechemesser, Annika; Koch, Nicolas; Mark, Ebba; Dilger, Elina; Kloesel, Patrick; Menicacci, Laura; Nachtigall, Daniel; Pretis, Felix; Ritter, Nolan; Schwarz, Moritz; Vossen, Helena; Wenzel, Anna
• 署名单位: Potsdam Institut fur Klimafolgenforschung; University of Potsdam; IZA Institute Labor Economics; University of Oxford; University of Oxford; University of Oxford; Organisation for Economic Co-operation & Development (OECD); University of Victoria; Technical University of Berlin
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-10972
• DOI: 10.1126/science.adl6547
• 发表日期: 2024-08-23
• 页码: 884-892
• 关键词: co2 emissions; adaptive lasso

摘要

Meeting the Paris Agreement's climate targets necessitates better knowledge about which climate policies work in reducing emissions at the necessary scale. We provide a global, systematic ex post evaluation to identify policy combinations that have led to large emission reductions out of 1500 climate policies implemented between 1998 and 2022 across 41 countries from six continents. Our approach integrates a comprehensive climate policy database with a machine learning-based extension of the common difference-in-differences approach. We identified 63 successful policy interventions with total emission reductions between 0.6 billion and 1.8 billion metric tonnes CO2. Our insights on effective but rarely studied policy combinations highlight the important role of price-based instruments in well-designed policy mixes and the policy efforts necessary for closing the emissions gap.