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Cross-national comparative assessment of synergies and conflicts in climate policy mixes

delete2026-03-11
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PRE
AI
L
Libo Wu
G
Guolei Liu
Z
Zhihao Huang
J
Jing Meng *
Y
Yang Zhou *
DOI:10.1038/s41558-026-02574-4delete
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Abstract

Abstract

En 中文
Carbon pricing is one of the most effective climate mitigation instruments, yet how it interacts with other climate policies and shapes their effectiveness remains unclear. Integrating the most comprehensive climate policy datasets covering more than 10,000 climate policies over 100 countries, this paper quantifies such policy interaction effects. We use synthetic control methods for policy effect estimation, construct a Global Climate Policy Index to reflect different policy designs and conduct global comparative studies on policy interactions. Our results show that under historical average levels of prices and coverage, emissions trading systems and carbon taxes reduce emission intensity by approximately 15.4% and 8.5%, respectively, and these reductions are significantly influenced by policy interactions, with both synergies and conflicts based on market maturity and policy intensity. Counterfactual simulations suggest that reducing such policy conflicts could improve carbon pricing effectiveness by up to 22.3%, highlighting the importance of policy coherence in climate mitigation strategies. Interactions between climate policy instruments can have synergistic and conflicting effects, but these interactions are not systematically understood. This research provides global evidence on how policy characteristics and interactions in different contexts could lead to different outcomes.
Keywords:
Climate-change mitigation
Climate-change policy
Economics
Environment
general
Climate Change
Climate Change/Climate Change Impacts
Environmental Law/Policy/Ecojustice

Journal

Nature Climate Change cover
Nature Climate Change
IF:
27.1
Papers:
4.3K
Citations:
5.4W

Organization

F
fudan university
Scholars:
11.3W
Papers: 7.6W
Citations: 121
S
Shanghai Innovation Institute
Scholars:
10
Papers: 8
Citations: 0
U
university college london
Scholars:
7.3K
Papers: 4.0K
Citations: 1
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