Hyperbolic Discounting is Rational: Valuing the Far Future with Uncertain Discount Rates

Farmer, Doyne James and Geanakoplos, John (2009) Hyperbolic Discounting is Rational: Valuing the Far Future with Uncertain Discount Rates. [Discussion Paper]. Yale University, Cowles Foundation for Research in Economics, New Haven (CT). p. 17. Cowles Foundation Discussion Paper (1719).

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Abstract/Index

Conventional economics supposes that agents value the present vs. the future using an exponential discounting function. In contrast, experiments with animals and humans suggest that agents are better described as hyperbolic discounters, whose discount function decays much more slowly at large times, as a power law. This is generally regarded as being time inconsistent or irrational. We show that when agents cannot be sure of their own future one-period discount rates, then hyperbolic discounting can become rational and exponential discounting irrational. This has important implications for environmental economics, as it implies a much larger weight for the far future.


Item Type:Report / Paper (Discussion Paper)
Research documents and activity classification:Working Papers > Non-Refereed Working Papers / of national relevance only
Divisions:Department of Business and Management
Uncontrolled Keywords:Hyperbolic discounting. Environment. Time consistent. Exponential discounting. Geometric random walk. Term structure of interest rates.
MIUR Scientific Area:Area 13 - Economics and Statistics > SECS-P/06 Applied Economics
Deposited By:Silvia Capobianchi
Deposited On:02 Nov 2009 10:08
Last Modified:17 Apr 2013 20:20

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