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The comparative importance for optimal climate policy of discounting, inequalities and catastrophes

Author

Listed:
  • Mark Budolfson

    (University of Vermont)

  • Francis Dennig

    (Yale-NUS College)

  • Marc Fleurbaey

    (Princeton WWS-UCHV, CFI)

  • Asher Siebert

    (Columbia University EI-IRI)

  • Robert H. Socolow

    (Princeton CFI, CMI, MAE)

Abstract

Integrated assessment models (IAMs) of climate and the economy provide estimates of the social cost of carbon and inform climate policy. With the Nested Inequalities Climate Economy model (NICE) (Dennig et al. PNAS 112:15,827–15,832, 2015), which is based on Nordhaus’s Regional Integrated Model of Climate and the Economy (RICE), but also includes inequalities within regions, we investigate the comparative importance of several factors—namely, time preference, inequality aversion, intraregional inequalities in the distribution of both damage and mitigation cost and the damage function. We do so by computing optimal carbon price trajectories that arise from the wide variety of combinations that are possible given the prevailing range of disagreement over each factor. This provides answers to a number of questions, including Thomas Schelling’s conjecture that properly accounting for inequalities could lead the inequality aversion parameter to have an effect opposite to what is suggested by the Ramsey equation.

Suggested Citation

  • Mark Budolfson & Francis Dennig & Marc Fleurbaey & Asher Siebert & Robert H. Socolow, 2017. "The comparative importance for optimal climate policy of discounting, inequalities and catastrophes," Climatic Change, Springer, vol. 145(3), pages 481-494, December.
    • Handle: RePEc:spr:climat:v:145:y:2017:i:3:d:10.1007_s10584-017-2094-x
    DOI: 10.1007/s10584-017-2094-x
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    Cited by:

    1. Richard S.J. Tol, 2018. "The impact of climate change and the social cost of carbon," Working Paper Series 1318, Department of Economics, University of Sussex Business School.
    2. 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.
    3. Rick Van der Ploeg, 2020. "Discounting And Climate Policy," OxCarre Working Papers 244, Oxford Centre for the Analysis of Resource Rich Economies, University of Oxford.
    4. Kornek, Ulrike & Klenert, David & Edenhofer, Ottmar & Fleurbaey, Marc, 2021. "The social cost of carbon and inequality: When local redistribution shapes global carbon prices," Journal of Environmental Economics and Management, Elsevier, vol. 107(C).
    5. Méjean, Aurélie & Pottier, Antonin & Zuber, Stéphane & Fleurbaey, Marc, 2023. "Opposite ethical views converge under the threat of catastrophic climate change," Ecological Economics, Elsevier, vol. 212(C).
    6. Lupi, Veronica & Marsiglio, Simone, 2021. "Population growth and climate change: A dynamic integrated climate-economy-demography model," Ecological Economics, Elsevier, vol. 184(C).
    7. Rising, James A. & Taylor, Charlotte & Ives, Matthew C. & Ward, Robert E.T., 2022. "Challenges and innovations in the economic evaluation of the risks of climate change," Ecological Economics, Elsevier, vol. 197(C).
    8. 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.
    9. Rising, James A. & Taylor, Charlotte & Ives, Matthew C. & Ward, Robert E.t., 2022. "Challenges and innovations in the economic evaluation of the risks of climate change," LSE Research Online Documents on Economics 114941, London School of Economics and Political Science, LSE Library.
    10. 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.
    11. Richard S. J. Tol, 2021. "Estimates of the social cost of carbon have increased over time," Papers 2105.03656, arXiv.org, revised Aug 2022.

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