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Reconciling consumption inequality with income inequality

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  • Christian A. Stoltenberg

    ()
    (University of Amsterdam)

  • Vadym Lepetyuk

    ()
    (Universidad de Alicante)

Abstract

The rise in consumption inequality in response to the increase in income inequality over the last three decades in the U.S. is puzzling to expected-utility-based incomplete market models. The two-sided lack of commitment models exhibit too little consumption inequality while the standard incomplete markets models tend to predict too much consumption inequality. We show that a model with two-sided lack of commitment and chance attitudes, as emphasized by prospect theory, can explain the relationship and can avoid the systematic bias of the expected utility models. The chance attitudes, such as optimism and pessimism, imply that the households attribute a higher weight to high and low outcomes compared to their objective probabilities. For realistic values of risk aversion and for chance attitudes found in experimental economics, the incentives for households to share the idiosyncratic risk decrease. The latter effect endogenously amplifies the increase in consumption inequality relative to the expected utility model, thereby improving the fit to the data.

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Bibliographic Info

Paper provided by Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie) in its series Working Papers. Serie AD with number 2012-19.

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Length: 37 pages
Date of creation: Nov 2012
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Publication status: Published by Ivie
Handle: RePEc:ivi:wpasad:2012-19

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Keywords: Consumption Inequality; Prospect Theory; Limited Enforcement; Risk Sharing.;

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