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

Author

Listed:
  • Nava Ashraf

    () (Harvard University)

  • Dean S. Karlan

    () (Yale University, Economic Growth Center)

  • Wesley Yin

    () (Princeton University)

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 significantly more likely to open the commitment savings account. After twelve months, average savings balances increased by 81 percentage points for those clients assigned to the treatment group relative to those assigned 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.

Suggested Citation

  • Nava Ashraf & Dean S. Karlan & Wesley Yin, 2005. "Tying Odysseus to the Mast: Evidence from a Commitment Savings Product in the Philippines," Working Papers 917, Economic Growth Center, Yale University.
  • Handle: RePEc:egc:wpaper:917
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    File URL: http://www.econ.yale.edu/growth_pdf/cdp917.pdf
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    References listed on IDEAS

    as
    1. Siwan Anderson & Jean-Marie Baland, 2002. "The Economics of Roscas and Intrahousehold Resource Allocation," The Quarterly Journal of Economics, Oxford University Press, vol. 117(3), pages 963-995.
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    More about this item

    Keywords

    Savings; commitment; hyperbolic preferences; microfinance; development economics; program evaluation; field experiment; self-control;

    JEL classification:

    • C93 - Mathematical and Quantitative Methods - - Design of Experiments - - - Field Experiments
    • D01 - Microeconomics - - General - - - Microeconomic Behavior: Underlying Principles
    • D11 - Microeconomics - - Household Behavior - - - Consumer Economics: Theory
    • D12 - Microeconomics - - Household Behavior - - - Consumer Economics: Empirical Analysis
    • D14 - Microeconomics - - Household Behavior - - - Household Saving; Personal Finance
    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
    • D91 - Microeconomics - - Micro-Based Behavioral Economics - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • O12 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development - - - Microeconomic Analyses of Economic Development

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