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How Persistent Low Expected Returns Alter Optimal Life Cycle Saving, Investment, and Retirement Behavior

Vanya Horneff, Raimond Maurer, Olivia S. Mitchell

NBER Working Paper No. 24311
Issued in February 2018, Revised in August 2018
NBER Program(s):Program on the Economics of Aging

This paper explores how an environment of persistent low returns influences saving, investing, and retirement behaviors, as compared to what in the past had been thought of as more “normal” financial conditions. Our calibrated lifecycle dynamic model with realistic tax, minimum distribution, and Social Security benefit rules produces results that agree with observed saving, work, and claiming age behavior of U.S. households. In particular, our model generates a large peak at the earliest claiming age at 62, as in the data. Also in line with the evidence, our baseline results show a smaller second peak at the (system-defined) Full Retirement Age of 66. In the context of a zero return environment, we show that workers will optimally devote more of their savings to non-retirement accounts and less to 401(k) accounts, since the relative appeal of investing in taxable versus tax-qualified retirement accounts is higher in a low return setting. Finally, we show that people claim Social Security benefits later in a low interest rate environment.

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Document Object Identifier (DOI): 10.3386/w24311

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