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Precommitments for Financial Self-Control:Evidence from Credit Card Borrowing

Author

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  • Sung-Jin Cho

    (Seoul National University)

  • John Rust

    (Georgetown University)

Abstract

We analyze a new data set on installment borrowing decisions of a sample of customers of a credit card company. In an attempt to increase its market share, the company more or less randomly offers its customers free installments, i.e. opportunities to finance credit card purchases via installment loans at a zero percent interest rate for durations up to twelve months. We exploit these offers as a quasi-random field experiment to better understand consumer demand for credit. Although there is considerable customer-level heterogeneity in installment usage, we show that the average take-up rate of free installment offers is low: customers choose them only 20% of time they are offered. Further, we provide evidence of pervasive precommitment behavior by individuals who do decide to take free installment offers. For example, we estimate that of the subset of 10 month free installment offers that are taken, only 18% are taken for the full 10 month term allowed under the offer. In the other 82% of these offers, customers precommit at the time of purchase to pay the balance in fewer than 10 installments. Thus, only 3.6% (18% × 20%) of all 10 month free installment offers are taken for the full 10 month duration. It is challenging to explain this behavior using standard expected utility models since there are no pre-payment penalties and the transactions costs involved in choosing these loans are small: rational customers should take every installment offer for the maximum allowed term when the interest rate is 0%. One explanation for this behavior is that consumers have financial self-control problems and resist the temptation to take interest-free loan offers. If they absolutely must borrow, most consumers choose repayment terms that are shorter than the maximum allowed term to avoid becoming excessively indebted.

Suggested Citation

  • Sung-Jin Cho & John Rust, 2015. "Precommitments for Financial Self-Control:Evidence from Credit Card Borrowing," 2015 Meeting Papers 33, Society for Economic Dynamics.
    • Handle: RePEc:red:sed015:33
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    References listed on IDEAS

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