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How to aggregate experts discount rates: an equilibrium approach

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Author Info
Elyès Jouini () (CEREMADE - CEntre de REcherches en MAthématiques de la DEcision - CNRS : UMR7534 - Université Paris Dauphine - Paris IX)
Clotilde Napp (DRM - Dauphine Recherches en Management - CNRS : UMR7088 - Université Paris Dauphine - Paris IX)

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Abstract

We address the problem of a social planner who, as in Weitzman (2001), gathers data on experts' discount rates and wants to infer the socially efficient consumption discount rate. We propose an 'equilibrium approach' and we analyse the expression and the properties of the resulting 'equilibrium discount rate'. We compare our expression for the discount rate with the different expressions that have been previously proposed in the literature. We analyse the impact of shifts in the distributions of experts discount rates. Finally, we apply our approach to Weitzman (2001)'s data to propose discount rates for public sector Cost-Benefit Analysis, in particular for the long term.

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Paper provided by HAL in its series Working Papers with number halshs-00394035_v1.

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Date of creation: Jul 2008
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Handle: RePEc:hal:wpaper:halshs-00394035_v1

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Related research
Keywords: consumption discount rate; equilibrium discount rate; experts discount rate; hyperbolic discounting; cost-benefit analysis; gamma discounting; divergence of opinion.;

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References listed on IDEAS
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  1. Mark Rubinstein., 1975. "The Strong Case for the Generalized Logarithmic Utility Model as the Premier Model of Financial Markets," Research Program in Finance Working Papers 34, University of California at Berkeley. [Downloadable!]
  2. Martin L. Weitzman, 2007. "A Review of the Stern Review on the Economics of Climate Change," Journal of Economic Literature, American Economic Association, vol. 45(3), pages 703-724, September.
  3. 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. [Downloadable!] (restricted)
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  4. Christian Gollier & Richard Zeckhauser, 2005. "Aggregation of Heterogeneous Time Preferences," Journal of Political Economy, University of Chicago Press, vol. 113(4), pages 878-896, August.
  5. Yvan Lengwiler, 2005. "Heterogeneous Patience and the Term Structure of Real Interest Rates," American Economic Review, American Economic Association, vol. 95(3), pages 890-896, June. [Downloadable!]
  6. Diego Nocetti & Elyès Jouini & Clotilde Napp, 2008. "Properties of the Social Discount Rate in a Benthamite Framework with Heterogeneous Degrees of Impatience," Post-Print halshs-00365980_v1, HAL. [Downloadable!]
  7. William D. Nordhaus, 2007. "A Review of the Stern Review on the Economics of Climate Change," Journal of Economic Literature, American Economic Association, vol. 45(3), pages 686-702, September.
  8. Landsberger, Michael & Meilijson, Isaac, 1990. "Demand for risky financial assets: A portfolio analysis," Journal of Economic Theory, Elsevier, vol. 50(1), pages 204-213, February. [Downloadable!] (restricted)
  9. 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. [Downloadable!] (restricted)
  10. Rothschild, Michael & Stiglitz, Joseph E., 1970. "Increasing risk: I. A definition," Journal of Economic Theory, Elsevier, vol. 2(3), pages 225-243, September. [Downloadable!] (restricted)
  11. Elyès Jouini & Jean-Michel Marin & Clotilde Napp, 2008. "Discounting and Divergence of Opinion," Working Papers halshs-00176636_v2, HAL. [Downloadable!]
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