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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

  • Schwarzinger, Michaël
  • Carrat, Fabrice
  • Luchini, Stéphane
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    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.

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    File URL: http://www.sciencedirect.com/science/article/pii/S0167-6296(09)00034-4
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    Article provided by Elsevier in its journal Journal of Health Economics.

    Volume (Year): 28 (2009)
    Issue (Month): 4 (July)
    Pages: 873-884

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    Handle: RePEc:eee:jhecon:v:28:y:2009:i:4:p:873-884
    Contact details of provider: Web page: http://www.elsevier.com/locate/inca/505560

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