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Precautionary saving and the marginal propensity to consume out of permanent income

  • Carroll, Christopher D.

The budget constraint requires that, eventually, consumption must adjust fully to any permanent shock to income. Intuition suggests that, knowing this, optimizing agents will fully adjust their spending immediately upon experiencing a permanent shock. However, this paper shows that if consumers are impatient and are subject to transitory as well as permanent shocks, the optimal marginal propensity to consume out of permanent shocks (the MPCP) is strictly less than 1, because buffer stock savers have a target wealth-to-permanent-income ratio; a positive shock to permanent income moves the ratio below its target, temporarily boosting saving.

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Paper provided by Center for Financial Studies (CFS) in its series CFS Working Paper Series with number 2009/16.

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Date of creation: 2009
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Handle: RePEc:zbw:cfswop:200916
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  1. Carroll, Christopher D & Kimball, Miles S, 1996. "On the Concavity of the Consumption Function," Econometrica, Econometric Society, vol. 64(4), pages 981-92, July.
  2. MaCurdy, Thomas E., 1982. "The use of time series processes to model the error structure of earnings in a longitudinal data analysis," Journal of Econometrics, Elsevier, vol. 18(1), pages 83-114, January.
  3. Miles S. Kimball, 1989. "Precautionary Saving in the Small and in the Large," NBER Working Papers 2848, National Bureau of Economic Research, Inc.
  4. Milton Friedman, 1957. "Introduction to "A Theory of the Consumption Function"," NBER Chapters, in: A Theory of the Consumption Function, pages 1-6 National Bureau of Economic Research, Inc.
  5. Richard Blundell & Hamish Low & Ian Preston, 2008. "Decomposing changes in income risk using consumption data," IFS Working Papers W08/13, Institute for Fiscal Studies.
  6. Deaton, Angus, 1991. "Saving and Liquidity Constraints," Econometrica, Econometric Society, vol. 59(5), pages 1221-48, September.
  7. Christopher D. Carroll, 2001. "A Theory of the Consumption Function, with and without Liquidity Constraints," Journal of Economic Perspectives, American Economic Association, vol. 15(3), pages 23-45, Summer.
  8. Deaton, Angus, 1992. "Understanding Consumption," OUP Catalogue, Oxford University Press, number 9780198288244, March.
  9. Tullio Jappelli & Luigi Pistaferri, 2006. "Intertemporal Choice and Consumption Mobility," Journal of the European Economic Association, MIT Press, vol. 4(1), pages 75-115, 03.
  10. Milton Friedman, 1957. "A Theory of the Consumption Function," NBER Books, National Bureau of Economic Research, Inc, number frie57-1, December.
  11. Christopher D. Carroll, 2009. "Theoretical Foundations of Buffer Stock Saving," 2009 Meeting Papers 210, Society for Economic Dynamics.
  12. Carroll, Christopher D. & Samwick, Andrew A., 1997. "The nature of precautionary wealth," Journal of Monetary Economics, Elsevier, vol. 40(1), pages 41-71, September.
  13. Christopher D Carroll & Miles S Kimball, 2001. "Liquidity Constraints and Precautionary Saving," Economics Working Paper Archive 455, The Johns Hopkins University,Department of Economics.
  14. John M. Abowd & David Card, 1986. "On the Covariance Structure of Earnings and Hours Changes," NBER Working Papers 1832, National Bureau of Economic Research, Inc.
  15. Caballero, R.J., 1988. "Consumption Puzzles And Precautionary Savings," Discussion Papers 1988_05, Columbia University, Department of Economics.
  16. Miles S. Kimball, 1990. "Precautionary Saving and the Marginal Propensity to Consume," NBER Working Papers 3403, National Bureau of Economic Research, Inc.
  17. Storesletten, Kjetil & Telmer, Christopher I. & Yaron, Amir, 2004. "Consumption and risk sharing over the life cycle," Journal of Monetary Economics, Elsevier, vol. 51(3), pages 609-633, April.
  18. David S. Johnson & Jonathan A. Parker & Nicholas S. Souleles, 2004. "Household Expenditure and the Income Tax Rebates of 2001," Working Papers 136, Princeton University, Woodrow Wilson School of Public and International Affairs, Discussion Papers in Economics..
  19. Christopher D. Carroll, 1992. "The Buffer-Stock Theory of Saving: Some Macroeconomic Evidence," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 23(2), pages 61-156.
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