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Too levered for Pigou: carbon pricing, financial constraints, and leverage regulation

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  • Döttling, Robin
  • Rola-Janicka, Magdalena

Abstract

We analyze jointly optimal carbon pricing and leverage regulation in a model with financial constraints and endogenous climate-related transition and physical risks. The socially optimal emissions tax is below the Pigouvian benchmark (equal to the direct social cost of emissions) when emissions taxes amplify financial constraints, or above this benchmark if physical climate risks have a substantial impact on collateral values. Additionally introducing leverage regulation can be welfare-improving only if tax rebates are not fully pledgeable. A cap-and-trade system or abatement subsidies may dominate carbon taxes because they can be designed to have a less adverse effect on financial constraints. JEL Classification: D62, G28, G32, G38, H23

Suggested Citation

  • Döttling, Robin & Rola-Janicka, Magdalena, 2023. "Too levered for Pigou: carbon pricing, financial constraints, and leverage regulation," Working Paper Series 2812, European Central Bank.
    • Handle: RePEc:ecb:ecbwps:20232812
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    JEL classification:

    • D62 - Microeconomics - - Welfare Economics - - - Externalities
    • G28 - Financial Economics - - Financial Institutions and Services - - - Government Policy and Regulation
    • G32 - Financial Economics - - Corporate Finance and Governance - - - Financing Policy; Financial Risk and Risk Management; Capital and Ownership Structure; Value of Firms; Goodwill
    • G38 - Financial Economics - - Corporate Finance and Governance - - - Government Policy and Regulation
    • H23 - Public Economics - - Taxation, Subsidies, and Revenue - - - Externalities; Redistributive Effects; Environmental Taxes and Subsidies

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