Robustness of a simple rule for the social cost of carbon

Rezai, A. & van der Ploeg, F. (2015). Robustness of a simple rule for the social cost of carbon. Economics Letters 132 48-55. 10.1016/j.econlet.2015.04.007.

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The optimal social cost of carbon is in general equilibrium proportional to GDP if utility is logarithmic, production is Cobb-Douglas, depreciation is 100% every period, climate damages as fraction of production decline exponentially with the stock of atmospheric carbon, and fossil fuel extraction does not require capital. The time profile and size of the optimal carbon tax corresponding to this simple rule are not robust to more convex climate damages, smaller elasticities of factor substitution and non-unitary coefficients of relative intergenerational inequality aversion. The optimal timing of energy transitions and the amount of fossil fuel reserves to be locked up in the earth are also not accurately predicted by this framework. Still, in terms of welfare and global warming the simple rule for the optimal social cost of carbon manages to get quite close to the first best.

Item Type: Article
Uncontrolled Keywords: climate damages; Ramsey growth; robustness; social cost of carbon; stranded fossil fuel assets
Research Programs: Risk, Policy and Vulnerability (RPV)
Risk & Resilience (RISK)
Bibliographic Reference: Economics Letters; 132:48-55 (July 2015) (Published online 20 April 2015)
Depositing User: IIASA Import
Date Deposited: 15 Jan 2016 08:53
Last Modified: 27 Aug 2021 17:39

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