Does Saving Cause Borrowing? Implications for the Coholding Puzzle

Paolina C. Medina and Michaela Pagel

Journal of Finance, 2025, vol. 80, issue 5, 2689-2738

Abstract: Using an experiment in which 3.1 million bank customers were encouraged to save, we explore the mechanisms behind coholding liquid savings and credit card debt. Theoretically, we show that the joint responses of spending, saving, and borrowing to the nudge differ across economic models of coholding. Using machine learning techniques, we find that the most responsive individuals reduce spending and increase savings by 4.9% (206 USD PPP per month) while their credit card debt remains unchanged. These individuals' marginal responses to the nudge are consistent with our model of coholding for the purpose of self‐ or partner‐control.

Date: 2025
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https://doi.org/10.1111/jofi.13466

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Persistent link: https://EconPapers.repec.org/RePEc:bla:jfinan:v:80:y:2025:i:5:p:2689-2738

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