2022-03-16-IMF-Economic_and_Environmental_Benefits_from_International_Cooperation_on_Climate_Policies_50页_6mb

Summary of “Economic and Environmental Benefits from International Cooperation on Climate Policies”

This report by the IMF Research Department analyzes mechanisms for international climate policy cooperation, addressing both environmental effectiveness and economic impacts. It evaluates an international carbon price floor (ICPF) differentiated by income levels, border carbon adjustments (BCAs), and sectoral carbon pricing agreements.

Key Findings:

1. International Carbon Price Floor (ICPF):

   • Substantially reduces global emissions at low macroeconomic cost ($25–$75/tCO2), aligning with the 2°C target.
   • Improves burden sharing by shifting emissions cuts and economic costs from low/middle-income countries (LICs/MICs) to high-income countries (HICs), though it may need complementary transfers.
   • GDP growth remains robust, and decarbonization is compatible with development, provided investments are supported.

2. Border Carbon Adjustments (BCAs):

   • Effective at reducing carbon leakage and protecting HIC competitiveness if based on foreign carbon content, but administratively burdensome.
   • BCAs do not significantly scale up global mitigation and may provoke trade tensions.

3. Sectoral Carbon Pricing for EITE Sectors:

   • A differentiated carbon price floor for energy-intensive and trade-exposed (EITE) sectors in LICs and MICs is a viable alternative to BCAs, avoiding competitiveness losses while minimizing trade friction.
   • This approach allows HICs to pursue ambitious policies without border adjustments, and enables revenue use by EMDEs.

4. Policy Recommendations:

   • The ICPF is the most effective mechanism for scaling up global action but requires international agreement.
   • If multilateral cooperation fails, sectoral agreements or BCAs can mitigate competitiveness concerns, but full economy-wide carbon pricing is the long-term goal.
   • Climate finance and technology transfers are critical for equity and efficiency.

Conclusion:

International cooperation, particularly through an ICPF, is essential to achieving climate goals. While unilateral actions by HICs are feasible, broader participation and burden-sharing mechanisms are necessary for equitable and efficient global mitigation.