Journal
HEALTH ECONOMICS
Volume 23, Issue 10, Pages 1213-1223Publisher
WILEY
DOI: 10.1002/hec.2980
Keywords
contingent valuation; willingness to pay; range bias; respondent certainty
Funding
- South Yorkshire Collaboration for Leadership in Applied Health Research and Care (CLAHRC)
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Willingness to pay (WTP) values derived from contingent valuation surveys are prone to a number of biases. Range bias occurs when the range of money values presented to respondents in a payment card affects their stated WTP values. This paper reports the results of an exploratory study whose aim was to investigate whether the effects of range bias can be reduced through the use of an alternative to the standard payment card method, namely, a random card sort method. The results suggest that the random card sort method is prone to range bias but that this bias may be mitigated by restricting the analysis to the WTP values of those respondents who indicate they are 'definitely sure' they would pay their stated WTP. Copyright (C) 2013 John Wiley & Sons, Ltd.
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