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"If you have the flu symptoms, your asymptomatic spouse may better answer the willingness-to-pay question". Evidence from a double-bounded dichotomous choice model with heterogeneous anchoring

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  • Michaël Schwarzinger

    (ESIM - Epidémiologie des maladies infectieuses et modélisation - UPMC - Université Pierre et Marie Curie - Paris 6 - INSERM - Institut National de la Santé et de la Recherche Médicale, Center for Health Policy - Stanford University)

  • Fabrice Carrat

    (ESIM - Epidémiologie des maladies infectieuses et modélisation - UPMC - Université Pierre et Marie Curie - Paris 6 - INSERM - Institut National de la Santé et de la Recherche Médicale)

  • Stéphane Luchini

    (GREQAM - Groupement de Recherche en Économie Quantitative d'Aix-Marseille - EHESS - École des hautes études en sciences sociales - AMU - Aix Marseille Université - ECM - École Centrale de Marseille - CNRS - Centre National de la Recherche Scientifique)

Abstract

The small sample size of contingent valuation (CV) surveys conducted in patients may have limited the use of the single-bounded (SB) dichotomous choice format which is recommended in environmental economics. In this paper, we explore two ways to increase the statistical efficiency of the SB format: (1) by the inclusion of proxies in addition to patients; (2) by the addition of a follow-up dichotomous question, i.e. the double-bounded (DB) dichotomous choice format. We found that patients (n=223) and spouses (n=64) answering on behalf of the patient had on average a similar willingness-to-pay for earlier alleviation of flu symptoms. However, a patient was significantly more likely to anchor his/her answer on the first bid as compared to a spouse. Finally, our original DB model with shift effect and heterogeneous anchoring reconciled the discrepancies found in willingness-to-pay statistics between SB and DB models in keeping with increased statistical efficiency.

Suggested Citation

  • Michaël Schwarzinger & Fabrice Carrat & Stéphane Luchini, 2009. ""If you have the flu symptoms, your asymptomatic spouse may better answer the willingness-to-pay question". Evidence from a double-bounded dichotomous choice model with heterogeneous anchori," Post-Print inserm-00636179, HAL.
    • Handle: RePEc:hal:journl:inserm-00636179
    DOI: 10.1016/j.jhealeco.2009.03.002
    Note: View the original document on HAL open archive server: https://inserm.hal.science/inserm-00636179
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