Permanent Income, Current Income, and Consumption

45 Pages Posted: 25 Jun 2004 Last revised: 29 Aug 2022

See all articles by John Y. Campbell

John Y. Campbell

Harvard University - Department of Economics; National Bureau of Economic Research (NBER)

N. Gregory Mankiw

Harvard University - Department of Economics; National Bureau of Economic Research (NBER)

Date Written: November 1987

Abstract

This paper reexamines the consistency of the permanent income hypothesis with aggregate, post-war, United States data. The permanent income hypothesis is nested within a more general model in which a fraction of income accrues to individuals who consume their current income rather than their permanent income. This fraction is estimated to be 40 or 50 percent, indicating a substantial departure from the permanent income hypothesis. This finding is robust to various statistical problems that have plagued previous work, such as time aggregation, and cannot be easily explained by appealing to changes in the real interest rate or to non-separabilities in the utility function.

Suggested Citation

Campbell, John Y. and Mankiw, N. Gregory, Permanent Income, Current Income, and Consumption (November 1987). NBER Working Paper No. w2436, Available at SSRN: https://ssrn.com/abstract=227096

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N. Gregory Mankiw

Harvard University - Department of Economics ( email )

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