IMF Working Papers

Climate Policy Diffusion Across US States

By Mitali Das, Manuel Linsenmeier, Gregor Schwerhoff

September 13, 2024

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Format: Chicago

Mitali Das, Manuel Linsenmeier, and Gregor Schwerhoff. "Climate Policy Diffusion Across US States", IMF Working Papers 2024, 198 (2024), accessed November 17, 2024, https://doi.org/10.5089/9798400285622.001

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Disclaimer: IMF Working Papers describe research in progress by the author(s) and are published to elicit comments and to encourage debate. The views expressed in IMF Working Papers are those of the author(s) and do not necessarily represent the views of the IMF, its Executive Board, or IMF management.

Summary

Climate policy at the subnational level is sometimes framed as being counterproductive, because climate change is considered a collective action problem that can be best addressed in a coalition that should be as large as possible. Using comprehensive data from US states on climate policy and policy outcomes, we show that state-level policy is effective in accelerating the adoption of solar energy. Crucially, however, state policies also have positive spillovers to other states, by making it more likely that neighboring states adopt climate policy as well. By proportionally attributing the spillover effects, we find that many US states achieve more climate benefits through the spillovers to other states than within their own jurisdiction. In a further step, we distinguish between climate policies in the energy sector and policies addressed either at other sectors or greenhouse gas emission (GHG) reductions generally. We find that climate policies in the energy sector are distinct from other climate policies in two ways: They have a significant effect on solar capacity growth and they diffuse more broadly.

Subject: Climate change, Climate policy, Environment, Greenhouse gas emissions, Renewable energy

Keywords: Climate change, Climate policies in the energy sector, Climate policy, Global, Greenhouse gas emissions, Policy diffusion, Policy evaluation, Policy outcome, Renewable energy, Spillovers, State policy, Subnational

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