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Why Do Households Save and Work?

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This paper develops and estimates a dynamic life-cycle model to quantify why households save and work. The model incorporates multiple sources of risk—health, marital status, wages, medical expenses and mortality—as well as endogenous labor supply and human capital accumulation, retirement, and bequest motives at the death of the first and last household member. We estimate it using PSID and HRS data for the 1941–1945 cohort via the Method of Simulated Moments. Eliminating bequest motives reduces aggregate wealth by 23.8% and labor earnings by 1.2%; removing medical expenses lowers them by 13.1% and 0.7%. Wage risk is crucial for early-life saving: its removal reduces wealth by 10.4% but raises earnings by 2.3%. Eliminating marriage and divorce dynamics leads couples—numerous and wealthier—to save and work slightly less, and singles—fewer and poorer—to save and work considerably more. These effects largely offset in the aggregate. Removing all saving motives beyond retirement needs and lifespan uncertainty lowers wealth by 56.9% and earnings by 2.7%. These findings show that capturing multiple risks and behavioral margins jointly is essential to understanding household saving and labor supply.

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  • Margherita Borella & Mariacristina De Nardi & Johanna P. Torres Chain & Fang Yang, 2025. "Why Do Households Save and Work?," Working Papers 2526, Federal Reserve Bank of Dallas.
    • Handle: RePEc:fip:feddwp:101316
    DOI: 10.24149/wp2526
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    1. Liebman, Jeffrey B. & Luttmer, Erzo F.P. & Seif, David G., 2009. "Labor supply responses to marginal Social Security benefits: Evidence from discontinuities," Journal of Public Economics, Elsevier, vol. 93(11-12), pages 1208-1223, December.
    2. Mariacristina De Nardi & Eric French & John Bailey Jones & Rory McGee, 2025. "Why Do Couples and Singles Save during Retirement? Household Heterogeneity and Its Aggregate Implications," Journal of Political Economy, University of Chicago Press, vol. 133(3), pages 750-792.
    3. Karen A. Kopecky & Tatyana Koreshkova, 2014. "The Impact of Medical and Nursing Home Expenses on Savings," American Economic Journal: Macroeconomics, American Economic Association, vol. 6(3), pages 29-72, July.
    4. Leslie A. Whittington & James Alm, 1997. "'Til Death or Taxes Do Us Part: The Effect of Income Taxation on Divorce," Journal of Human Resources, University of Wisconsin Press, vol. 32(2), pages 388-412.
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    JEL classification:

    • E20 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - General (includes Measurement and Data)
    • I1 - Health, Education, and Welfare - - Health
    • J0 - Labor and Demographic Economics - - General

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