Priority for the worse-off and the social cost of carbon
Identifieur interne : 000036 ( Main/Exploration ); précédent : 000035; suivant : 000037Priority for the worse-off and the social cost of carbon
Auteurs : Matthew Adler [États-Unis] ; David Anthoff [États-Unis] ; Valentina Bosetti [Italie] ; Greg Garner [États-Unis] ; Klaus Keller [États-Unis] ; Nicolas Treich [France]Source :
- Nature Climate Change [ 1758-678X ] ; 2017.
English descriptors
- mix :
Abstract
The social cost of carbon (SCC) is a key tool in climate policy. The SCC expresses in monetary terms the social impact of the emission of a ton of CO2 in a given year. The SCC is calculated using a 'social welfare function' (SWF): a method for assessing social welfare. The dominant SWF in climate policy is the discounted-utilitarian SWF. Individuals' well-being numbers (utilities) are summed, and the values for later generations are reduced ('discounted'). This SWF has been criticized for ignoring the distribution of well-being and including an arbitrary time preference. Here, we use a 'prioritarian' SWF, with no time discount, to calculate the SCC. This SWF gives extra weight ('priority') to worse-off individuals. Prioritarianism is a well-developed concept in ethics and welfare economics, but has been rarely used in climate scholarship. We find substantial differences between the discounted-utilitarian and non-discounted prioritarian SCCs.
Url:
DOI: 10.1038/nclimate3298
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en">The social cost of carbon (SCC) is a key tool in climate policy. The SCC expresses in monetary terms the social impact of the emission of a ton of CO2 in a given year. The SCC is calculated using a 'social welfare function' (SWF): a method for assessing social welfare. The dominant SWF in climate policy is the discounted-utilitarian SWF. Individuals' well-being numbers (utilities) are summed, and the values for later generations are reduced ('discounted'). This SWF has been criticized for ignoring the distribution of well-being and including an arbitrary time preference. Here, we use a 'prioritarian' SWF, with no time discount, to calculate the SCC. This SWF gives extra weight ('priority') to worse-off individuals. Prioritarianism is a well-developed concept in ethics and welfare economics, but has been rarely used in climate scholarship. We find substantial differences between the discounted-utilitarian and non-discounted prioritarian SCCs.</div>
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