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The Marginal Willingness-to-Pay for Attributes of a Hypothetical HIV Vaccine


  • Michael P. Cameron

    () (University of Waikato)

  • Peter A. Newman

    (University of Toronto)

  • Surachet Roungprakhon

    (Rajamangala University of Technology Phra Nakhon)

  • Riccardo Scarpa

    (University of Waikato)


This paper estimates the marginal willingness-to-pay for attributes of a hypothetical HIV vaccine using discrete choice modeling. We use primary data from 326 respondents from Bangkok and Chiang Mai, Thailand, in 2008-2009, selected using purposive, venue-based sampling across two strata. Participants completed a structured questionnaire and full rank discrete choice modelling task administered using computer-assisted personal interviewing. The choice experiment was used to rank eight hypothetical HIV vaccine scenarios, with each scenario comprising seven attributes (including cost) each of which had two levels. The data were analyzed in two alternative specifications: (1) best-worst; and (2) full-rank, using logit likelihood functions estimated with custom routines in Gauss matrix programming language. Knowledge of the relative importance of determinants of HIV vaccine acceptability is important to ensure the success of future vaccination programs. Future acceptability studies of hypothetical HIV vaccines should use more finely-grained biomedical attributes, and could also improve the external validity of results by including more levels of the cost attribute.

Suggested Citation

  • Michael P. Cameron & Peter A. Newman & Surachet Roungprakhon & Riccardo Scarpa, 2012. "The Marginal Willingness-to-Pay for Attributes of a Hypothetical HIV Vaccine," Working Papers in Economics 12/11, University of Waikato.
  • Handle: RePEc:wai:econwp:12/11

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    References listed on IDEAS

    1. McConnell K. E., 1995. "Consumer Surplus from Discrete Choice Models," Journal of Environmental Economics and Management, Elsevier, vol. 29(3), pages 263-270, November.
    2. Alejandro Caparrós & José L. Oviedo & Pablo Campos, 2008. "Would You Choose Your Preferred Option? Comparing Choice and Recoded Ranking Experiments," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 90(3), pages 843-855.
    3. Hausman, Jerry A. & Ruud, Paul A., 1987. "Specifying and testing econometric models for rank-ordered data," Journal of Econometrics, Elsevier, vol. 34(1-2), pages 83-104.
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    More about this item


    HIV vaccine; willingness-to-pay; conjoint analysis; discrete choice; Thailand;

    JEL classification:

    • I19 - Health, Education, and Welfare - - Health - - - Other

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