Climate policy uncertainty and firm‐level carbon dioxide emissions: Assessing the impact in the U.S. market
研究了2003-2021年美国1007家上市公司数据，发现气候政策不确定性上升会促使企业减排，资本支出也有类似效果，但研发支出与碳排放关系不显著。
Abstract This paper examines the impact of climate policy uncertainty (CPU) on carbon dioxide (CO 2 ) emissions of 1007 listed firms over 2003–2021. As the urgency to combat climate change and implement effective policies may create uncertainty, it focuses on the Unites States, a significant emitter with a complex policy landscape. Using the two‐step system generalized method of moments estimation, the analysis reveals a negative CPU–CO 2 emissions relationship, indicating that increased CPU incentivizes firms to adopt sustainable practices, leading to emissions reductions. Capital expenditures have similar effects on emissions, accompanied by increased corporate sustainability engagement. However, no significant relationship is found between research and development (R&D) expenditure and CO 2 emissions, nor does CPU significantly moderate the R&D–CO 2 emissions nexus. Firms with substantial fixed assets exhibit higher CO 2 emissions, while heavy emitters demonstrate limited CPU responsiveness. These findings provide valuable insights for policymakers encouraging corporate participation in emissions reduction efforts.