Is the Uncertainty about Climate Change Too Large for Expected Cost-Benefit Analysis?

Richard Tol

No FNU-3, Working Papers from Research unit Sustainability and Global Change, Hamburg University

Abstract: Cost-benefit analysis is only applicable if the variances of both costs and benefits are finite. In the case of climate change, the variances of the net present marginal costs and benefits of greenhouse gas emission reduction need to be finite. Finiteness is hard, if not impossible to prove. The opposite is easier to establish as one needs to shows that there is one, not impossible representation of the climate change with infinite variance. The paper shows that all relevant current variables of the FUND model have finite variances. However, there is a small chance that climate change reverses economic growth in some regions. In that case, the discount rate becomes negative and the net present marginal benefits of greenhouse gas emission reduction becomes very large. So large, that its variance is unbounded.

Keywords: Climate change; cost-benefit analysis; uncertainty (search for similar items in EconPapers)
JEL-codes: Q54 (search for similar items in EconPapers)
Pages: 21 pages
Date: 2000-09, Revised 2000-09
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

Published, Climatic Change, 56 (3), 265-289

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