IDEAS home Printed from https://ideas.repec.org/p/ces/ceswps/_8441.html
   My bibliography  Save this paper

Discounting and Climate Policy

Author

Listed:
  • Rick van der Ploeg

Abstract

The social rate of discount is a crucial driver of the social cost of carbon (SCC), i.e. the expected present discounted value of marginal damages resulting from emitting one ton of carbon today. Policy makers should set carbon prices to the SCC using a carbon tax or a competitive permits market. The social discount rate is lower and the SCC higher if policy makers are more patient and if future generations are less affluent and policy makers care about intergenerational inequality. Uncertainty about the future rate of growth of the economy and emissions and the risk of macroeconomic disasters (tail risks) also depress the social discount rate and boost the SCC provided intergenerational inequality aversion is high. Various reasons (e.g. autocorrelation in the economic growth rate or the idea that a decreasing certainty-equivalent discount rate results from a discount rate with a distribution that is constant over time) are discussed for why the social discount rate is likely to decline over time. A declining social discount rate also emerges if account is taken from the relative price effects resulting from different growth rates for ecosystem services and of labour in efficiency units. The market-based asset pricing approach to carbon pricing is contrasted with a more ethical approach to policy making. Some suggestions for further research are offered.

Suggested Citation

  • Rick van der Ploeg, 2020. "Discounting and Climate Policy," CESifo Working Paper Series 8441, CESifo.
  • Handle: RePEc:ces:ceswps:_8441
    as

    Download full text from publisher

    File URL: https://www.cesifo.org/DocDL/cesifo1_wp8441.pdf
    Download Restriction: no
    ---><---

    Other versions of this item:

    References listed on IDEAS

    as
    1. Laurence Kotlikoff & Felix Kubler & Andrey Polbin & Jeffrey Sachs & Simon Scheidegger, 2021. "Making Carbon Taxation A Generational Win Win," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 62(1), pages 3-46, February.
    2. Gollier, Christian, 2010. "Ecological discounting," Journal of Economic Theory, Elsevier, vol. 145(2), pages 812-829, March.
    3. Hepburn, Cameron & Groom, Ben, 2007. "Gamma discounting and expected net future value," Journal of Environmental Economics and Management, Elsevier, vol. 53(1), pages 99-109, January.
    4. Terrence Iverson & Larry Karp, 2021. "Carbon Taxes and Climate Commitment with Non-constant Time Preference," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 88(2), pages 764-799.
    5. Simon Dietz & Frederick van der Ploeg & Armon Rezai & Frank Venmans, 2021. "Are Economists Getting Climate Dynamics Right and Does It Matter?," Journal of the Association of Environmental and Resource Economists, University of Chicago Press, vol. 8(5), pages 895-921.
    6. Hepburn, Cameron & Koundouri, Phoebe & Panopoulou, Ekaterini & Pantelidis, Theologos, 2009. "Social discounting under uncertainty: A cross-country comparison," Journal of Environmental Economics and Management, Elsevier, vol. 57(2), pages 140-150, March.
    7. Philipp Krüger & Augustin Landier & David Thesmar, 2015. "The WACC Fallacy: The Real Effects of Using a Unique Discount Rate," Journal of Finance, American Finance Association, vol. 70(3), pages 1253-1285, June.
    8. Niko Jaakkola & Antony Millner, 2022. "Nondogmatic Climate Policy," Journal of the Association of Environmental and Resource Economists, University of Chicago Press, vol. 9(4), pages 807-841.
    9. Moritz A. Drupp, 2018. "Limits to Substitution Between Ecosystem Services and Manufactured Goods and Implications for Social Discounting," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 69(1), pages 135-158, January.
    10. Ton S. van den Bremer & Frederick van der Ploeg, 2021. "The Risk-Adjusted Carbon Price," American Economic Review, American Economic Association, vol. 111(9), pages 2782-2810, September.
    11. Derek Lemoine & Christian P. Traeger, 2016. "Economics of tipping the climate dominoes," Nature Climate Change, Nature, vol. 6(5), pages 514-519, May.
    12. Andrew Caplin & John Leahy, 2004. "The Social Discount Rate," Journal of Political Economy, University of Chicago Press, vol. 112(6), pages 1257-1268, December.
    13. Richard S. J. Tol, 2010. "International Inequity Aversion And The Social Cost Of Carbon," Climate Change Economics (CCE), World Scientific Publishing Co. Pte. Ltd., vol. 1(01), pages 21-32.
    14. Derek Lemoine & Christian Traeger, 2014. "Watch Your Step: Optimal Policy in a Tipping Climate," American Economic Journal: Economic Policy, American Economic Association, vol. 6(1), pages 137-166, February.
    15. Larry G. Epstein & Emmanuel Farhi & Tomasz Strzalecki, 2014. "How Much Would You Pay to Resolve Long-Run Risk?," American Economic Review, American Economic Association, vol. 104(9), pages 2680-2697, September.
    16. Larry G. Epstein & Stanley E. Zin, 2013. "Substitution, risk aversion and the temporal behavior of consumption and asset returns: A theoretical framework," World Scientific Book Chapters, in: Leonard C MacLean & William T Ziemba (ed.), HANDBOOK OF THE FUNDAMENTALS OF FINANCIAL DECISION MAKING Part I, chapter 12, pages 207-239, World Scientific Publishing Co. Pte. Ltd..
    17. Gernot Wagner & Martin L. Weitzman, 2016. "Climate Shock: The Economic Consequences of a Hotter Planet," Economics Books, Princeton University Press, edition 2, number 10725.
    18. Gollier, Christian, 2004. "Maximizing the expected net future value as an alternative strategy to gamma discounting," Finance Research Letters, Elsevier, vol. 1(2), pages 85-89, June.
    19. Gollier, Christian & Weitzman, Martin L., 2010. "How should the distant future be discounted when discount rates are uncertain?," Economics Letters, Elsevier, vol. 107(3), pages 350-353, June.
    20. Per Krusell & Anthony A. Smith, Jr., 2003. "Consumption--Savings Decisions with Quasi--Geometric Discounting," Econometrica, Econometric Society, vol. 71(1), pages 365-375, January.
    21. Robert S. Pindyck, 2011. "Fat Tails, Thin Tails, and Climate Change Policy," Review of Environmental Economics and Policy, Association of Environmental and Resource Economists, vol. 5(2), pages 258-274, Summer.
    22. Gollier, Christian, 2002. "Time Horizon and the Discount Rate," Journal of Economic Theory, Elsevier, vol. 107(2), pages 463-473, December.
    23. Yongyang Cai & Thomas S. Lontzek, 2019. "The Social Cost of Carbon with Economic and Climate Risks," Journal of Political Economy, University of Chicago Press, vol. 127(6), pages 2684-2734.
    24. Newell, Richard G. & Pizer, William A., 2003. "Discounting the distant future: how much do uncertain rates increase valuations?," Journal of Environmental Economics and Management, Elsevier, vol. 46(1), pages 52-71, July.
    25. Martin L. Weitzman, 2009. "On Modeling and Interpreting the Economics of Catastrophic Climate Change," The Review of Economics and Statistics, MIT Press, vol. 91(1), pages 1-19, February.
    26. Kimball, Miles S, 1990. "Precautionary Saving in the Small and in the Large," Econometrica, Econometric Society, vol. 58(1), pages 53-73, January.
    27. Moritz A. Drupp & Martin C. Hänsel, 2021. "Relative Prices and Climate Policy: How the Scarcity of Nonmarket Goods Drives Policy Evaluation," American Economic Journal: Economic Policy, American Economic Association, vol. 13(1), pages 168-201, February.
    28. Moritz A. Drupp & Mark C. Freeman & Ben Groom & Frikk Nesje, 2018. "Discounting Disentangled," American Economic Journal: Economic Policy, American Economic Association, vol. 10(4), pages 109-134, November.
    29. Reyer Gerlagh & Matti Liski, 2018. "Consistent climate policies," Journal of the European Economic Association, European Economic Association, vol. 16(1), pages 1-44.
    30. Phoebe Koundouri & Theologos Pantelidis & Ben Groom & Ekaterini Panopoulou, 2007. "Discounting the distant future: How much does model selection affect the certainty equivalent rate?," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 22(3), pages 641-656.
    31. Yongyang Cai & Timothy M. Lenton & Thomas S. Lontzek, 2016. "Risk of multiple interacting tipping points should encourage rapid CO2 emission reduction," Nature Climate Change, Nature, vol. 6(5), pages 520-525, May.
    32. H. Damon Matthews & Nathan P. Gillett & Peter A. Stott & Kirsten Zickfeld, 2009. "The proportionality of global warming to cumulative carbon emissions," Nature, Nature, vol. 459(7248), pages 829-832, June.
    33. Karp, Larry, 2005. "Global warming and hyperbolic discounting," Journal of Public Economics, Elsevier, vol. 89(2-3), pages 261-282, February.
    34. Armon Rezai & Frederick Van Der Ploeg, 2017. "Abandoning Fossil Fuel: How Fast and How Much," Manchester School, University of Manchester, vol. 85(S2), pages 16-44, December.
    35. Ben Groom & David Maddison Pr., 2019. "New Estimates of the Elasticity of Marginal Utility for the UK," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 72(4), pages 1155-1182, April.
    36. Zhu, Xueqin & Smulders, Sjak & de Zeeuw, Aart, 2019. "Discounting in the presence of scarce ecosystem services," Journal of Environmental Economics and Management, Elsevier, vol. 98(C).
    37. Kenneth J. Arrow & Robert C. Lind, 1974. "Uncertainty and the Evaluation of Public Investment Decisions," Palgrave Macmillan Books, in: Chennat Gopalakrishnan (ed.), Classic Papers in Natural Resource Economics, chapter 3, pages 54-75, Palgrave Macmillan.
    38. Myles R. Allen & David J. Frame & Chris Huntingford & Chris D. Jones & Jason A. Lowe & Malte Meinshausen & Nicolai Meinshausen, 2009. "Warming caused by cumulative carbon emissions towards the trillionth tonne," Nature, Nature, vol. 458(7242), pages 1163-1166, April.
    39. Traeger, Christian P., 2011. "Sustainability, limited substitutability, and non-constant social discount rates," Journal of Environmental Economics and Management, Elsevier, vol. 62(2), pages 215-228, September.
    40. Christian Gollier, 2011. "On the Underestimation of the Precautionary Effect in Discounting," CESifo Working Paper Series 3536, CESifo.
    41. Dietz, Simon & Venmans, Frank, 2019. "Cumulative carbon emissions and economic policy: In search of general principles," Journal of Environmental Economics and Management, Elsevier, vol. 96(C), pages 108-129.
    42. Dietz, Simon & Gollier, Christian & Kessler, Louise, 2018. "The climate beta," Journal of Environmental Economics and Management, Elsevier, vol. 87(C), pages 258-274.
    43. David Laibson, 1997. "Golden Eggs and Hyperbolic Discounting," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 112(2), pages 443-478.
    44. Martin Weitzman, 2012. "The Ramsey Discounting Formula for a Hidden-State Stochastic Growth Process," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 53(3), pages 309-321, November.
    45. Therese Grijalva & Jayson Lusk & W. Shaw, 2014. "Discounting the Distant Future: An Experimental Investigation," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 59(1), pages 39-63, September.
    46. -, 2009. "The economics of climate change," Sede Subregional de la CEPAL para el Caribe (Estudios e Investigaciones) 38679, Naciones Unidas Comisión Económica para América Latina y el Caribe (CEPAL).
    47. Barrage, Lint, 2018. "Be careful what you calibrate for: Social discounting in general equilibrium," Journal of Public Economics, Elsevier, vol. 160(C), pages 33-49.
    48. Frederick Ploeg, 2018. "The safe carbon budget," Climatic Change, Springer, vol. 147(1), pages 47-59, March.
    49. Thomas Sterner & U. Martin Persson, 2008. "An Even Sterner Review: Introducing Relative Prices into the Discounting Debate," Review of Environmental Economics and Policy, Association of Environmental and Resource Economists, vol. 2(1), pages 61-76, Winter.
    50. Stern,Nicholas, 2007. "The Economics of Climate Change," Cambridge Books, Cambridge University Press, number 9780521700801, September.
    51. Christian Gollier, 2011. "On the Underestimation of the Precautionary Effect in Discounting*," The Geneva Risk and Insurance Review, Palgrave Macmillan;International Association for the Study of Insurance Economics (The Geneva Association), vol. 36(2), pages 95-111, December.
    52. Dietz, Simon & Venmans, Frank, 2019. "The endowment effect, discounting and the environment," Journal of Environmental Economics and Management, Elsevier, vol. 97(C), pages 67-91.
    53. David J. Evans, 2005. "The elasticity of marginal utility of consumption: estimates for 20 OECD countries," Fiscal Studies, Institute for Fiscal Studies, vol. 26(2), pages 197-224, June.
    54. Karp, Larry & Tsur, Yacov, 2011. "Time perspective and climate change policy," Journal of Environmental Economics and Management, Elsevier, vol. 62(1), pages 1-14, July.
    55. Martin L. Weitzman, 2001. "Gamma Discounting," American Economic Review, American Economic Association, vol. 91(1), pages 260-271, March.
    56. Christian Gollier, 2008. "Discounting with fat-tailed economic growth," Journal of Risk and Uncertainty, Springer, vol. 37(2), pages 171-186, December.
    57. Christian Gollier, 2012. "Pricing the Planet's Future: The Economics of Discounting in an Uncertain World," Economics Books, Princeton University Press, edition 1, volume 1, number 9894.
    58. Antony Millner, 2020. "Nondogmatic Social Discounting," American Economic Review, American Economic Association, vol. 110(3), pages 760-775, March.
    59. Frederick van der Ploeg & Aart de Zeeuw, 2018. "Climate Tipping and Economic Growth: Precautionary Capital and the Price of Carbon," Journal of the European Economic Association, European Economic Association, vol. 16(5), pages 1577-1617.
    60. Robert J. Barro, 2009. "Rare Disasters, Asset Prices, and Welfare Costs," American Economic Review, American Economic Association, vol. 99(1), pages 243-264, March.
    61. Partha Dasgupta, 2008. "Discounting climate change," Journal of Risk and Uncertainty, Springer, vol. 37(2), pages 141-169, December.
    62. Anthony C. Fisher & John V. Krutilla, 1975. "Resource Conservation, Environmental Preservation, and the Rate of Discount," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 89(3), pages 358-370.
    63. Wilfred Beckerman & Cameron Hepburn, 2007. "Ethics of the Discount Rate in the Stern Review on the Economics of Climate Change," World Economics, World Economics, 1 Ivory Square, Plantation Wharf, London, United Kingdom, SW11 3UE, vol. 8(1), pages 187-210, January.
    64. Pindyck, Robert S., 2019. "The social cost of carbon revisited," Journal of Environmental Economics and Management, Elsevier, vol. 94(C), pages 140-160.
    65. Martin L. Weitzman, 2011. "Fat-Tailed Uncertainty in the Economics of Catastrophic Climate Change," Review of Environmental Economics and Policy, Association of Environmental and Resource Economists, vol. 5(2), pages 275-292, Summer.
    66. Millner, Antony & Heal, Geoffrey, 2018. "Discounting by committee," Journal of Public Economics, Elsevier, vol. 167(C), pages 91-104.
    67. Hayne E. Leland, 1968. "Saving and Uncertainty: The Precautionary Demand for Saving," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 82(3), pages 465-473.
    68. Lucas, Robert E, Jr, 1978. "Asset Prices in an Exchange Economy," Econometrica, Econometric Society, vol. 46(6), pages 1429-1445, November.
    69. repec:bla:jfinan:v:59:y:2004:i:4:p:1481-1509 is not listed on IDEAS
    70. Martin L. Weitzman, 2007. "Subjective Expectations and Asset-Return Puzzles," American Economic Review, American Economic Association, vol. 97(4), pages 1102-1130, September.
    71. Weitzman, Martin L., 1998. "Why the Far-Distant Future Should Be Discounted at Its Lowest Possible Rate," Journal of Environmental Economics and Management, Elsevier, vol. 36(3), pages 201-208, November.
    72. Arrow Kenneth J, 2007. "Global Climate Change: A Challenge to Policy," The Economists' Voice, De Gruyter, vol. 4(3), pages 1-5, June.
    73. Millner, Antony & Healey, Andrew, 2018. "Discounting by committee," LSE Research Online Documents on Economics 90246, London School of Economics and Political Science, LSE Library.
    74. Nicholas Stern, 2008. "The Economics of Climate Change," American Economic Review, American Economic Association, vol. 98(2), pages 1-37, May.
    75. 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.
    76. Thomas S. Lontzek & Yongyang Cai & Kenneth L. Judd & Timothy M. Lenton, 2015. "Stochastic integrated assessment of climate tipping points indicates the need for strict climate policy," Nature Climate Change, Nature, vol. 5(5), pages 441-444, May.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Frederick Ploeg, 2021. "Carbon pricing under uncertainty," International Tax and Public Finance, Springer;International Institute of Public Finance, vol. 28(5), pages 1122-1142, October.
    2. Olijslagers, Stan & van der Ploeg, Frederick & van Wijnbergen, Sweder, 2023. "On current and future carbon prices in a risky world," Journal of Economic Dynamics and Control, Elsevier, vol. 146(C).
    3. Lanlan Luo & Shou Chen & Ziran Zou, 2020. "Determining the Generalized Discount Rate for Risky Projects," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 77(1), pages 143-158, September.
    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. Kent D. Daniel & Robert B. Litterman & Gernot Wagner, 2016. "Applying Asset Pricing Theory to Calibrate the Price of Climate Risk," NBER Working Papers 22795, National Bureau of Economic Research, Inc.
    6. Richard S. J. Tol, 2021. "Estimates of the social cost of carbon have increased over time," Papers 2105.03656, arXiv.org, revised Aug 2022.
    7. van der Ploeg, Frederick & ,, 2018. "Pricing Carbon Under Economic and Climactic Risks: Leading-Order Results from Asymptotic Analysis," CEPR Discussion Papers 12642, C.E.P.R. Discussion Papers.
    8. Moritz A. Drupp & Martin C. Hänsel, 2021. "Relative Prices and Climate Policy: How the Scarcity of Nonmarket Goods Drives Policy Evaluation," American Economic Journal: Economic Policy, American Economic Association, vol. 13(1), pages 168-201, February.
    9. Kollenberg, Sascha & Taschini, Luca, 2016. "Emissions trading systems with cap adjustments," Journal of Environmental Economics and Management, Elsevier, vol. 80(C), pages 20-36.
    10. Cameron Hepburn & Greer Gosnell, 2014. "Evaluating impacts in the distant future: cost–benefit analysis, discounting and the alternatives," Chapters, in: Giles Atkinson & Simon Dietz & Eric Neumayer & Matthew Agarwala (ed.), Handbook of Sustainable Development, chapter 9, pages 140-159, Edward Elgar Publishing.
    11. Buchholz Wolfgang & Heindl Peter, 2015. "Ökonomische Herausforderungen des Klimawandels," Perspektiven der Wirtschaftspolitik, De Gruyter, vol. 16(4), pages 324-350, December.
    12. Ton S. van den Bremer & Frederick van der Ploeg, 2021. "The Risk-Adjusted Carbon Price," American Economic Review, American Economic Association, vol. 111(9), pages 2782-2810, September.
    13. Frederick Ploeg & Armon Rezai, 2019. "Simple Rules for Climate Policy and Integrated Assessment," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 72(1), pages 77-108, January.
    14. Gollier, Christian, 2012. "A theory of rational short-termism with uncertain betas," LERNA Working Papers 12.14.371, LERNA, University of Toulouse.
    15. Moritz Drupp & Mark Freeman & Ben Groom & Frikk Nesje, 2015. "Discounting disentangled: an expert survey on the determinants of the long-term social discount rate," GRI Working Papers 196a, Grantham Research Institute on Climate Change and the Environment.
    16. Cropper, Maureen, 2012. "How Should Benefits and Costs Be Discounted in an Intergenerational Context?," RFF Working Paper Series dp-12-42, Resources for the Future.
    17. Freeman, Mark C. & Groom, Ben, 2016. "How certain are we about the certainty-equivalent long term social discount rate?," Journal of Environmental Economics and Management, Elsevier, vol. 79(C), pages 152-168.
    18. Gollier, Christian, 2016. "Evaluation of long-dated assets: The role of parameter uncertainty," Journal of Monetary Economics, Elsevier, vol. 84(C), pages 66-83.
    19. Christian Gollier, 2012. "Evaluation of Long-Dated Investments under Uncertain Growth Trend, Volatility and Catastrophes," CESifo Working Paper Series 4052, CESifo.
    20. Gollier, Christian, 2012. "Asset pricing with uncertain betas: A long-term perspective," IDEI Working Papers 752, Institut d'Économie Industrielle (IDEI), Toulouse.

    More about this item

    Keywords

    cost-benefit analysis; climate policy; carbon pricing; social discount rate; term structure; Keynes-Ramsey rule; risk and uncertainty; disasters; expert opinions;
    All these keywords.

    JEL classification:

    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
    • D90 - Microeconomics - - Micro-Based Behavioral Economics - - - General
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • H43 - Public Economics - - Publicly Provided Goods - - - Project Evaluation; Social Discount Rate
    • Q51 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Valuation of Environmental Effects
    • Q54 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Climate; Natural Disasters and their Management; Global Warming
    • Q58 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Government Policy

    NEP fields

    This paper has been announced in the following NEP Reports:

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:ces:ceswps:_8441. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Klaus Wohlrabe (email available below). General contact details of provider: https://edirc.repec.org/data/cesifde.html .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.