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Climate sensitivity, agricultural productivity and the social cost of carbon in FUND

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  • Kevin D. Dayaratna

    (Heritage Foundation)

  • Ross McKitrick

    (University of Guelph)

  • Patrick J. Michaels

    (Competitive Enterprise Institute)

Abstract

We explore the implications of recent empirical findings about CO2 fertilization and climate sensitivity on the social cost of carbon (SCC) in the FUND model. New compilations of satellite and experimental evidence suggest larger agricultural productivity gains due to CO2 growth are being experienced than are reflected in FUND parameterization. We also discuss recent studies applying empirical constraints to the probability distribution of equilibrium climate sensitivity and we argue that previous Monte Carlo analyses in IAMs have not adequately reflected the findings of this literature. Updating the distributions of these parameters under varying discount rates is influential on SCC estimates. The lower bound of the social cost of carbon is likely negative and the upper bound is much lower than previously claimed, at least through the mid-twenty-first century. Also the choice of discount rate becomes much less important under the updated parameter distributions.

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  • Kevin D. Dayaratna & Ross McKitrick & Patrick J. Michaels, 2020. "Climate sensitivity, agricultural productivity and the social cost of carbon in FUND," Environmental Economics and Policy Studies, Springer;Society for Environmental Economics and Policy Studies - SEEPS, vol. 22(3), pages 433-448, July.
    • Handle: RePEc:spr:envpol:v:22:y:2020:i:3:d:10.1007_s10018-020-00263-w
    DOI: 10.1007/s10018-020-00263-w
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    Cited by:

    1. David Anthoff & Richard S. J. Tol, 2022. "Testing the Dismal Theorem," Journal of the Association of Environmental and Resource Economists, University of Chicago Press, vol. 9(5), pages 885-920.
    2. Philip Meyer, 2023. "Comment on ‘Climate sensitivity, agricultural productivity and the social cost of carbon in FUND’," Environmental Economics and Policy Studies, Springer;Society for Environmental Economics and Policy Studies - SEEPS, vol. 25(2), pages 285-290, April.
    3. Ronan Connolly & Michael Connolly & Robert M. Carter & Willie Soon, 2020. "How Much Human-Caused Global Warming Should We Expect with Business-As-Usual (BAU) Climate Policies? A Semi-Empirical Assessment," Energies, MDPI, vol. 13(6), pages 1-51, March.
    4. Richard S.J. Tol, 2021. "Estimates of the social cost of carbon have not changed over time," Working Paper Series 0821, Department of Economics, University of Sussex Business School.
    5. Coilín ÓhAiseadha & Gerré Quinn & Ronan Connolly & Michael Connolly & Willie Soon, 2020. "Energy and Climate Policy—An Evaluation of Global Climate Change Expenditure 2011–2018," Energies, MDPI, vol. 13(18), pages 1-49, September.
    6. Richard S.J. Tol, 2020. "Kernel density decomposition with an application to the social cost of carbon," Working Paper Series 0720, Department of Economics, University of Sussex Business School.
    7. Richard S. J. Tol, 2021. "Estimates of the social cost of carbon have increased over time," Papers 2105.03656, arXiv.org, revised Aug 2022.
    8. Kevin Dayaratna & Ross McKitrick, 2023. "Reply to comment on “climate sensitivity, agricultural productivity and the social cost of carbon in fund” by Philip Meyer," Environmental Economics and Policy Studies, Springer;Society for Environmental Economics and Policy Studies - SEEPS, vol. 25(2), pages 291-298, April.

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