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Delay Functions as the Foundation of Time Preference: Testing for Separable Discounted Utility

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  • Keith Marzilli Ericson
  • Jawwad Noor

Abstract

Delay functions, which vary timing of rewards but fix the money dimension, can elicit the form of discount functions with minimal assumptions. We present a general theorem that characterizes the set of discount functions and utility indices compatible with any 'regular' preference. We provide conditions to test for separable discounted utility (SDU). We elicit individual delay functions for a range of amounts and time horizons. When we impose SDU assumptions, we classify more than half our analysis sample as exponential discounters. However, we reject SDU assumptions for 68% of the sample in favor of magnitude-dependent discounting with time distortion.

Suggested Citation

  • Keith Marzilli Ericson & Jawwad Noor, 2015. "Delay Functions as the Foundation of Time Preference: Testing for Separable Discounted Utility," NBER Working Papers 21095, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:21095
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    References listed on IDEAS

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    Cited by:

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    2. Felix Chopra & Armin Falk & Thomas Graeber, 2024. "Intertemporal Altruism," American Economic Journal: Microeconomics, American Economic Association, vol. 16(1), pages 329-357, February.
    3. Han Bleichrodt & Rogier J. D. Potter van Loon & Drazen Prelec, 2022. "Beta-Delta or Delta-Tau? A Reformulation of Quasi-Hyperbolic Discounting," Management Science, INFORMS, vol. 68(8), pages 6326-6335, August.
    4. Mark Schneider, 2018. "A Dual System Model of Risk and Time Preferences," Working Papers 18-18, Chapman University, Economic Science Institute.
    5. Sebastian Schweighofer-Kodritsch, 2015. "Time Preferences and Bargaining," STICERD - Theoretical Economics Paper Series /2015/568, Suntory and Toyota International Centres for Economics and Related Disciplines, LSE.
    6. Jonathan Cohen & Keith Marzilli Ericson & David Laibson & John Myles White, 2020. "Measuring Time Preferences," Journal of Economic Literature, American Economic Association, vol. 58(2), pages 299-347, June.
    7. Mark Schneider, 2016. "Dual Process Utility Theory: A Model of Decisions Under Risk and Over Time," Working Papers 16-23, Chapman University, Economic Science Institute.
    8. Jawwad Noor & Norio Takeoka, "undated". "Impatience as Selfishness," Boston University - Department of Economics - Working Papers Series WP2018-008, Boston University - Department of Economics.

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    More about this item

    JEL classification:

    • D01 - Microeconomics - - General - - - Microeconomic Behavior: Underlying Principles
    • D03 - Microeconomics - - General - - - Behavioral Microeconomics: Underlying Principles
    • D9 - Microeconomics - - Micro-Based Behavioral Economics
    • D91 - Microeconomics - - Micro-Based Behavioral Economics - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making

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