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Consumption Insurance or Consumption Mobility

Author

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  • Jappelli, Tullio
  • Pistaferri, Luigi

Abstract

The theory of full consumption insurance posits that households are insulated from all idiosyncratic shocks so that the ratio of the marginal utilities of consumption of any two households is constant over time. Consumption insurance therefore implies absence of consumption mobility between any two time periods. This implication requires knowledge of the evolution of the entire consumption distribution, not just its mean as in standard tests of complete markets. We test this unexplored prediction of the theory using a panel drawn from the Bank of Italy Survey of Household Income and Wealth. We design an appropriate non-parametric test and find substantial mobility of consumption even controlling for possible preference shifts and measurement error in consumption. The findings strongly reject the theory of full consumption insurance.

Suggested Citation

  • Jappelli, Tullio & Pistaferri, Luigi, 1999. "Consumption Insurance or Consumption Mobility," CEPR Discussion Papers 2148, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:2148
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    Cited by:

    1. Koeniger, Winfried, 2001. "Labor and Financial Market Interactions: The Case of Labor Income Risk and Car Insurance in the UK 1969-95," IZA Discussion Papers 240, Institute of Labor Economics (IZA).

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    Keywords

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    JEL classification:

    • D52 - Microeconomics - - General Equilibrium and Disequilibrium - - - Incomplete Markets
    • D91 - Microeconomics - - Micro-Based Behavioral Economics - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making
    • I30 - Health, Education, and Welfare - - Welfare, Well-Being, and Poverty - - - General

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