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Tying Odysseus to the Mast: Evidence from a Commitment Savings Product in the Philippines

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Author Info
Nava Ashaf
Dean Karlan
Wesley Yin
Abstract

We designed a commitment savings product for a Philippine bank and implemented it using a randomized control methodology. The savings product was intended for individuals who want to commit now to restrict access to their savings, and who were sophisticated enough to engage in such a mechanism. We conducted a baseline survey on 1777 existing or former clients of a bank. One month later, we offered the commitment product to a randomly chosen subset of 710 clients; 202 (28.4 percent) accepted the offer and opened the account. In the baseline survey, we asked hypothetical time discounting questions. Women who exhibited a lower discount rate for future relative to current tradeoffs, and hence potentially have a preference for commitment, were indeed more likely to open the commitment savings account. After six (twelve) months, average savings balances at the partnering bank increased by 46 (80) percent for the treatment group relative to the control group. Those who opened the account increased savings by 192 (337) percent relative to the control group. We conclude that the savings response represents a lasting change in savings, and not merely a short-term response to a new product.

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Paper provided by The Field Experiments Website in its series Natural Field Experiments with number 0007.

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Date of creation: 2004
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Handle: RePEc:feb:natura:0007

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Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
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  2. Richard H. Thaler & Shlomo Benartzi, 2004. "Save More Tomorrow (TM): Using Behavioral Economics to Increase Employee Saving," Journal of Political Economy, University of Chicago Press, vol. 112(S1), pages S164-S187, February. [Downloadable!] (restricted)
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  4. Laibson, David, 1997. "Golden Eggs and Hyperbolic Discounting," The Quarterly Journal of Economics, MIT Press, vol. 112(2), pages 443-77, May.
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  7. Joseph Henrich & Robert Boyd & Samuel Bowles & Colin Camerer & Ernst Fehr & Herbert Gintis & Richard McElreath, 2001. "Cooperation, Reciprocity and Punishment in Fifteen Small-scale Societies," Working Papers 01-01-007, Santa Fe Institute.
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  10. David I. Laibson, 1996. "Hyperbolic Discount Functions, Undersaving, and Savings Policy," NBER Working Papers 5635, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  14. Stefano DellaVigna & M. Daniele Paserman, 2004. "Job Search and Impatience," NBER Working Papers 10837, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  15. George-Marios Angeletos et al., 2001. "The Hyberbolic Consumption Model: Calibration, Simulation, and Empirical Evaluation," Journal of Economic Perspectives, American Economic Association, vol. 15(3), pages 47-68, Summer. [Downloadable!] (restricted)
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  1. Dean S. Karlan, 2005. "Using Experimental Economics to Measure Social Capital And Predict Financial Decisions," Working Papers 909, Economic Growth Center, Yale University. [Downloadable!]
    Other versions:
  2. Dean S. Karlan & Jonathan Zinman, 2005. "Observing Unobservables: Identifying Information Asymmetries with a Consumer Credit Field Experiment," Working Papers 911, Economic Growth Center, Yale University. [Downloadable!]
    Other versions:
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