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DISCOUNTING OF DELAYED REWARDS: MODELS OF INDIVIDUAL CHOICE

DISCOUNTING OF DELAYED REWARDS: MODELS OF INDIVIDUAL CHOICE The present paper addresses the question of the form of the mathematical relation between the time until a delayed reward and its present value. Data are presented from an experiment in which subjects chose between hypothetical amounts of money available either immediately or after a delay (Green, Fry, & Myerson, 1994). Analyses of the behavior of individual young adults demonstrated that temporal discounting is better described by hyperbola‐like functions than by exponential decay functions. For most individuals, the parameter that determines the rate of discounting varied inversely with amount. Raising the denominator of the discounting function to a power resulted in better descriptions of the data from most subjects. Two possible derivations of the temporal discounting function are proposed, a repeated choice model and an expected value model. These provide theoretical interpretations for amount‐dependent discounting but amount‐independent exponent parameters. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Experimental Analysis of Behavior Wiley

DISCOUNTING OF DELAYED REWARDS: MODELS OF INDIVIDUAL CHOICE

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References (29)

Publisher
Wiley
Copyright
Copyright © 1995 Wiley Subscription Services
ISSN
0022-5002
eISSN
1938-3711
DOI
10.1901/jeab.1995.64-263
Publisher site
See Article on Publisher Site

Abstract

The present paper addresses the question of the form of the mathematical relation between the time until a delayed reward and its present value. Data are presented from an experiment in which subjects chose between hypothetical amounts of money available either immediately or after a delay (Green, Fry, & Myerson, 1994). Analyses of the behavior of individual young adults demonstrated that temporal discounting is better described by hyperbola‐like functions than by exponential decay functions. For most individuals, the parameter that determines the rate of discounting varied inversely with amount. Raising the denominator of the discounting function to a power resulted in better descriptions of the data from most subjects. Two possible derivations of the temporal discounting function are proposed, a repeated choice model and an expected value model. These provide theoretical interpretations for amount‐dependent discounting but amount‐independent exponent parameters.

Journal

Journal of the Experimental Analysis of BehaviorWiley

Published: Jan 1, 1995

Keywords: ; ; ; ; ;

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