This paper examines predictions of a life-cycle simulation model—in which individuals face uncertainty regarding their length of life, earnings, and out-of-pocket medical expenditures, and imperfect insurance and lending markets—for individual and aggregate wealth accumulation. Relative to life-cycle or buffer-stock alternatives, our augmented life-cycle model better matches a variety of features of U.S. data, including: (1) aggregate wealth, (2) cross-sectional differences in wealth-age and consumption-age profiles by education group, and (3) short-run time series comovements of consumption and income.
Hubbard, R. Glenn, Jonathan Skinner, and Stephen Zeldes. "The Importance of Precautionary Motives for Explaining Individual and Aggregate Saving." Carnegie-Rochester Conference Series on Public Policy 40 (June 1994): 59-125.
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