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Title: Declining discount rates and the Fisher Effect: inflated past, discounted future?
Authors: Freeman, Mark
Groom, Ben
Panopoulou, Ekaterina
Pantelidis, Theologos
Keywords: Social discounting
Declining discount rates
Fisher effect
Real and niminal interest rates
Social cost of carbon
Issue Date: 2015
Publisher: © Elsevier
Citation: FREEMAN, M. ... et al, 2015. Declining discount rates and the Fisher Effect: inflated past, discounted future? Journal of Environmental Economics and Management, 73, pp. 32-39.
Abstract: Uncertain and persistent real interest rates underpin one argument for using a declining term structure of social discount rates in the Expected Net Present Value (ENPV) framework. Despite being controversial, this approach has influenced both the Inter-Agency Working Group on Cost-Benefit Analysis and the UK government's guidelines on discounting. We first clarify the theoretical basis of the ENPV approach. Then, rather than following previous work which used a single series of U.S. Treasury bond returns, we treat nominal interest rates and inflation as co-integrated series and estimate the empirical term structure of discount rates via the ‘Fisher Effect’. This nests previous empirical models and is more flexible. It also addresses an irregularity in previous work which used data on nominal interest rates until 1950, and real interest rates thereafter. As we show, the real and nominal data have very different time series properties. This paper therefore provides a robustness check on previous discounting advice and updated methodological guidance at a time when governments around the world are reviewing their guidelines on social discounting. The policy implications are discussed in the context of the Social Cost of Carbon, nuclear decommissioning and public health.
Description: This paper was accepted for publication in the journal Journal of Environmental Economics and Management and the definitive published version is available at http://dx.doi.org/10.1016/j.jeem.2015.06.003
Version: Accepted for publication
DOI: 10.1016/j.jeem.2015.06.003
URI: https://dspace.lboro.ac.uk/2134/18348
Publisher Link: http://dx.doi.org/10.1016/j.jeem.2015.06.003
ISSN: 1096-0449
Appears in Collections:Published Articles (Business)

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