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The permanent income hypothesis, transitional dynamics, and excess sensitivity of consumption

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  • Kim, H. Youn

Abstract

This paper studies the transitional dynamics of the linear-quadratic consumption model and reexamines existing analyses of the permanent income hypothesis (PIH). The model accounts for the life-cycle consumption behavior, with the short-run and long-run consumption functions linking consumption to wealth. We show that the random walk model of consumption violates the relevant stability condition and delivers predictions that are inconsistent with the PIH. We find that while excess sensitivity may be due to liquidity constraints, it can also arise in accordance with the PIH in perfect capital markets − contrary to the prevailing view. Simulation experiments prove useful to explain the observed consumption behavior.

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  • Kim, H. Youn, 2017. "The permanent income hypothesis, transitional dynamics, and excess sensitivity of consumption," Structural Change and Economic Dynamics, Elsevier, vol. 40(C), pages 10-25.
    • Handle: RePEc:eee:streco:v:40:y:2017:i:c:p:10-25
    DOI: 10.1016/j.strueco.2016.10.001
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    Cited by:

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    3. H. Youn Kim & José Alberto Molina & K. K. Gary Wong, 2024. "Durable goods and consumer behavior with liquidity constraints," Scandinavian Journal of Economics, Wiley Blackwell, vol. 126(1), pages 155-193, January.
    4. Reis Gomes, Fábio Augusto, 2020. "Evaluating a consumption function with precautionary savings and habit formation under a general income process," The Quarterly Review of Economics and Finance, Elsevier, vol. 76(C), pages 157-166.

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    More about this item

    Keywords

    Permanent income hypothesis; Random walk; Euler equation; Stability condition; Excess sensitivity of consumption;
    All these keywords.

    JEL classification:

    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth

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