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Political Science > Environmental Policy

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Cover IMF Working Papers
Cross-Border Impacts of Climate Policy Packages in North America
Jean-Marc Fournier, Tannous Kass-Hanna, Liam Masterson, Anne-Charlotte Paret, and Sneha D Thube
We quantify cross-border effects of the recent climate mitigation policies introduced in Canada and the U.S., using the global general equilibrium model IMF-ENV. Notably, with the substantial emission reductions from Canada’s carbon tax-led mitigation policies and the U.S.’ Inflation Reduction Act, these two countries would bridge two-thirds of the gap toward their Nationally Determined Contribution (NDC) goals. While the broadly divergent policies are believed to elicit competitiveness concerns, we find the aggregate cross-border effects within North America to be very limited and restricted to the energy intensive and trade exposed industries. Potential carbon leakages are also found to be negligible. A more meaningful difference triggered by policy heterogeneity is rather domestic, especially with U.S. subsidies increasing energy output while the Canada model with a carbon tax would marginally decrease it. This analysis is complemented by a stylized model illustrating how such divergence can affect the terms of trade, but also how these effects can be countered by exchange rate flexibility, border adjustments or domestic taxation.
Keywords:
Climate Policy; Climate Change Policy; Nationally Determined Contributions (NDCs); Mitigation; Climate subsidies; Carbon Tax; Carbon pricing; Spillovers; North America; Global; IMF-ENV model; Computable General Equilibrium (CGE) models; Competitiveness; Greenhouse Gas Emissions (GHG); Revenue Recycling; Inflation Reduction Act (IRA); Power; Electricity; climate policy package; mitigation policy; green subsidy; Canada's Carbon pricing policy; divergent policy
Cover IMF Working Papers
Can International Technological Diffusion Substitute for Coordinated Global Policies to Mitigate Climate Change?
Mr. Philip Barrett
In short, yes. I use a multi-region integrated assessment model with fuel-specific endogenous technical change to examine the impact of Europe and China reducing emissions to zero by mid-century. Without international technological diffusion this is insufficient to avoid catastrophic climate change. But when innovation can diffuse overseas, long-run temperature increases are limited to 3 degrees. This occurs because policy not only encourages green innovations but also dissuades dirty innovations which would otherwise spread. The most effective policy package in emissions-reducing regions is a research subsidy funded by a carbon tax, driven in the short term by the direct effect of the carbon tax on the composition of energy, and later by innovation induced by research subsidies. Green production subsidies are ineffective because they undermine incentives for innovation.
Keywords:
research subsidy; policy package; green production subsidy; package in emissions-reducing region; energy-producing firm; Carbon tax; Climate policy; Greenhouse gas emissions; Spillovers; Global; Europe