Tying Odysseus to the Mast: Evidence from a Commitment Savings Product in the Philippines
AbstractWe 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.
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Bibliographic InfoPaper provided by Economic Growth Center, Yale University in its series Working Papers with number 917.
Length: 40 pages
Date of creation: Jul 2005
Date of revision:
Savings; commitment; hyperbolic preferences; microfinance; development economics; program evaluation; field experiment; self-control;
Other versions of this item:
- Nava Ashraf & Dean Karlan & Wesley Yin, 2006. "Tying Odysseus to the Mast: Evidence from a Commitment Savings Product in the Philippines," The Quarterly Journal of Economics, MIT Press, vol. 121(2), pages 635-672, May.
- Nava Ashaf & Dean Karlan & Wesley Yin, 2004. "Tying odysseus to the mast: Evidence from a commitment savings product in the philippines," Natural Field Experiments 00206, The Field Experiments Website.
- 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 - - Intertemporal Choice - - - Intertemporal Household Choice; Life Cycle Models and Saving
- G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
- O12 - Economic Development, Technological Change, and Growth - - Economic Development - - - Microeconomic Analyses of Economic Development
This paper has been announced in the following NEP Reports:
- NEP-ALL-2005-08-13 (All new papers)
- NEP-DEV-2005-08-13 (Development)
- NEP-FIN-2005-08-13 (Finance)
- NEP-SEA-2005-08-13 (South East Asia)
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