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Does Saving Cause Borrowing? Implications for the Coholding Puzzle

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  • PAOLINA C. MEDINA
  • MICHAELA PAGEL

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.

Suggested Citation

  • Paolina C. Medina & Michaela Pagel, 2025. "Does Saving Cause Borrowing? Implications for the Coholding Puzzle," Journal of Finance, American Finance Association, vol. 80(5), pages 2689-2738, October.
    • Handle: RePEc:bla:jfinan:v:80:y:2025:i:5:p:2689-2738
    DOI: 10.1111/jofi.13466
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