Stated and actual altruistic willingness to pay for insecticide-treated nets in Nigeria: validity of open-ended and binary with follow-up questions
Objectives: To determine whether the binary with follow-up (BWFU) or open-ended (OPED) contingent valuation question format would yield better valid estimates of altruistic willingness to pay (WTP) and examine the feasibility of using intra-community altruistic contributions to procure insecticide-treated nets (ITNs) for the poor in Nigeria. Methods: Structured questionnaires were used to elicit stated altruistic WTP from a random sub-sample of respondents that had either the OPED or BWFU used to elicit WTP in Southeast Nigeria. One month after the survey the respondents were asked to redeem their WTP pledges. Construct validity was determined using econometric analyses, while phi correlation coefficient was used to determine criterion validity. Findings: More than 57% of the respondents were hypothetically willing to pay for altruism in both BWFU and OPED groups. Altruistic WTP was positively related to respondents' WTP for own nets (p<0.01) and nets for other household members (p<0.05) in both groups. A total of 27.0% and 33.1% of the respondents with positive hypothetical WTP in the BWFU and OPED actually contributed. Phi correlation coefficient was 0.23 (95%CI 0.20-0.29) in BWFU and 0.49 (95%CI 0.44-0.54) in OPED. The money realised was used to buy some ITNs, which were presented to poor people selected by community leaders. Conclusion: The OPED elicited better valid estimates of altruistic WTP than BWFU. The potential for more capable people to contribute for the poor in ITNs programmes actually exist and malaria control programmes should explore altruistic contributions as a means to increase net coverage. Copyright © 2004 John Wiley & Sons, Ltd.
Volume (Year): 13 (2004)
Issue (Month): 5 ()
|Contact details of provider:|| Web page: http://www3.interscience.wiley.com/cgi-bin/jhome/5749|
References listed on IDEAS
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.:
- Thomas C. Brown & Patricia A. Champ & Richard C. Bishop & Daniel W. McCollum, 1996. "Which Response Format Reveals the Truth about Donations to a Public Good?," Land Economics, University of Wisconsin Press, vol. 72(2), pages 152-166.
- John Loomis & Thomas Brown & Beatrice Lucero & George Peterson, 1997. "Evaluating the Validity of the Dichotomous Choice Question Format in Contingent Valuation," Environmental & Resource Economics, European Association of Environmental and Resource Economists, vol. 10(2), pages 109-123, September.
- Trudy Ann Cameron & John Quiggin, 1992.
"Estimation Using Contingent Valuation Data From a "Dichotomous Choice with Follow-Up" Questionnaire,"
UCLA Economics Working Papers
653, UCLA Department of Economics.
- Cameron Trudy Ann & Quiggin John, 1994. "Estimation Using Contingent Valuation Data from a Dichotomous Choice with Follow-Up Questionnaire," Journal of Environmental Economics and Management, Elsevier, vol. 27(3), pages 218-234, November.
- Andreoni, James, 1990. "Impure Altruism and Donations to Public Goods: A Theory of Warm-Glow Giving?," Economic Journal, Royal Economic Society, vol. 100(401), pages 464-77, June.
- Mary Jo Kealy & John F. Dovidio & Mark L. Rockel, 1988. "Accuracy in Valuation Is a Matter of Degree," Land Economics, University of Wisconsin Press, vol. 64(2), pages 158-171.
- Duan, Naihua, et al, 1983. "A Comparison of Alternative Models for the Demand for Medical Care," Journal of Business & Economic Statistics, American Statistical Association, vol. 1(2), pages 115-26, April.
- Klose, Thomas, 1999. "The contingent valuation method in health care," Health Policy, Elsevier, vol. 47(2), pages 97-123, May.
- Herriges, Joseph A. & Shogren, Jason F., 1996.
"Starting Point Bias in Dichotomous Choice Valuation with Follow-Up Questioning,"
Staff General Research Papers
1501, Iowa State University, Department of Economics.
- Herriges, Joseph A. & Shogren, Jason F., 1996. "Starting Point Bias in Dichotomous Choice Valuation with Follow-Up Questioning," Journal of Environmental Economics and Management, Elsevier, vol. 30(1), pages 112-131, January.
- Cam Donaldson & Ruth Thomas & David Torgerson, 1997. "Validity of open-ended and payment scale approaches to eliciting willingness to pay," Applied Economics, Taylor & Francis Journals, vol. 29(1), pages 79-84.
- Thomas H. Stevens & homas A. More & Ronald J. Glass, 1994. "Interpretation and Temporal Stability of CV Bids for Wildlife Existence: A Panel Study," Land Economics, University of Wisconsin Press, vol. 70(3), pages 355-363.
- Helen R. Neill & Ronald G. Cummings & Philip T. Ganderton & Glenn W. Harrison & Thomas McGuckin, 1994. "Hypothetical Surveys and Real Economic Commitments," Land Economics, University of Wisconsin Press, vol. 70(2), pages 145-154.
- A Asgary & K G Willis, 1997. "Estimating the benefits of construction measures to mitigate earthquake risks in Iran," Environment and Planning B: Planning and Design, Pion Ltd, London, vol. 24(4), pages 613-624, July.
- Blumenschein, Karen & Johannesson, Magnus & Yokoyama, Krista K. & Freeman, Patricia R., 2001. "Hypothetical versus real willingness to pay in the health care sector: results from a field experiment," Journal of Health Economics, Elsevier, vol. 20(3), pages 441-457, May.
- Frykblom, Peter, 1997. "Hypothetical Question Modes and Real Willingness to Pay," Journal of Environmental Economics and Management, Elsevier, vol. 34(3), pages 275-287, November.
- Onwujekwe, Obinna & Chima, Reginald & Shu, Elvis & Nwagbo, Douglas & Akpala, Cyril & Okonkwo, Paul, 2002. "Altruistic willingness to pay in community-based sales of insecticide-treated nets exists in Nigeria," Social Science & Medicine, Elsevier, vol. 54(4), pages 519-527, February.
- Ryan, Mandy & Scott, David A. & Donaldson, Cam, 2004. "Valuing health care using willingness to pay: a comparison of the payment card and dichotomous choice methods," Journal of Health Economics, Elsevier, vol. 23(2), pages 237-258, March.
- Jones-Lee, M W & Hammerton, M & Philips, P R, 1985. "The Value of Safety: Results of a National Sample Survey," Economic Journal, Royal Economic Society, vol. 95(377), pages 49-72, March.
When requesting a correction, please mention this item's handle: RePEc:wly:hlthec:v:13:y:2004:i:5:p:477-492. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Wiley-Blackwell Digital Licensing)or (Christopher F. Baum)
If references are entirely missing, you can add them using this form.