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Clean Innovation, Heterogeneous Financing Costs, and the Optimal Climate Policy Mix

Author

Listed:
  • Emanuele Campiglio
  • Alessandro Spiganti
  • Anthony Wiskich
Abstract
Access to finance is a major barrier to clean innovation. We incorporate a financial sector in a directed technological change model, where research firms working on different technologies raise funding from financial intermediaries at potentially different costs. We show that, in addition to a rising carbon tax and a generous but short-lived clean research subsidy, optimal climate policies include a clean finance subsidy directly aimed at reducing the financing cost differential across technologies. The presence of an endogenous financing experience effect induces stronger mitigation efforts in the short-term to accelerate the convergence of heterogeneous financing costs. This is achieved primarily through a carbon price premium of 39% in 2025, relative to a case with no financing costs.

Suggested Citation

  • Emanuele Campiglio & Alessandro Spiganti & Anthony Wiskich, 2023. "Clean Innovation, Heterogeneous Financing Costs, and the Optimal Climate Policy Mix," CAMA Working Papers 2023-25, Centre for Applied Macroeconomic Analysis, Crawford School of Public Policy, The Australian National University, revised May 2024.
    • Handle: RePEc:een:camaaa:2023-25
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    More about this item

    Keywords

    carbon tax; endogenous growth; innovation policy; green financial policy; low-carbon transition; optimal climate policy; sustainable finance;
    All these keywords.

    JEL classification:

    • H23 - Public Economics - - Taxation, Subsidies, and Revenue - - - Externalities; Redistributive Effects; Environmental Taxes and Subsidies
    • O31 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives
    • O44 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - Environment and Growth
    • Q55 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Technological Innovation
    • Q58 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Government Policy
    • G18 - Financial Economics - - General Financial Markets - - - Government Policy and Regulation

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