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Does observational equivalence always hold in hyperbolic discounting models?

Author

Listed:
  • Gong Liutang

    (Guanghua School of Management,Peking University)

  • Zhu Shenghao

    (Department of Economics, New York University)

Abstract

Observation equivalence holds in the hyperbolic discounting models such as Laibson (1996), Barro (1999), and Krusell et al (2002). We study a hyperbolic discounting model where the policy function cannot be replicated by a geometric discounting model. Under the logarithmic utility and Cobb-Douglas production, we obtain the explicit solution for consumer's consumption-saving decision. Different from the literatures of exponential discounting, our model shows that the habit persistence affects consumer''s consumption-saving decision. Therefore, observational equivalence does not hold in our hyperbolic discounting model.

Suggested Citation

  • Gong Liutang & Zhu Shenghao, 2006. "Does observational equivalence always hold in hyperbolic discounting models?," Economics Bulletin, AccessEcon, vol. 5(8), pages 1-8.
    • Handle: RePEc:ebl:ecbull:eb-06e20003
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    File URL: http://www.accessecon.com/pubs/EB/2006/Volume5/EB-06E20003A.pdf
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    References listed on IDEAS

    as
    1. Krusell, Per & Kuruscu, Burhanettin & Smith, Anthony Jr., 2002. "Equilibrium Welfare and Government Policy with Quasi-geometric Discounting," Journal of Economic Theory, Elsevier, vol. 105(1), pages 42-72, July.
    2. David I. Laibson, 1996. "Hyperbolic Discount Functions, Undersaving, and Savings Policy," NBER Working Papers 5635, National Bureau of Economic Research, Inc.
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    Cited by:

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    2. Caputo, Michael R., 2013. "The intrinsic comparative dynamics of infinite horizon optimal control problems with a time-varying discount rate and time-distance discounting," Journal of Economic Dynamics and Control, Elsevier, vol. 37(4), pages 810-820.
    3. Choi, Yoonseok, 2017. "Revisiting the effect of a technology shock on hours," Economics Letters, Elsevier, vol. 157(C), pages 67-70.

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    More about this item

    Keywords

    Consumption function;

    JEL classification:

    • E2 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment
    • D1 - Microeconomics - - Household Behavior

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