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Published in: BMC Medical Research Methodology 1/2015

Open Access 01-12-2015 | Research article

Consistency between stated and revealed preferences: a discrete choice experiment and a behavioural experiment on vaccination behaviour compared

Authors: Mattijs S Lambooij, Irene A Harmsen, Jorien Veldwijk, Hester de Melker, Liesbeth Mollema, Yolanda WM van Weert, G Ardine de Wit

Published in: BMC Medical Research Methodology | Issue 1/2015

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Abstract

Background

Discrete Choice Experiments (DCEs) are increasingly used in studies in healthcare research but there is still little empirical evidence for the predictive value of these hypothetical situations in similar real life circumstances. The aim of this paper is to compare the stated preferences in a DCE and the accompanying questionnaire with the revealed preferences of young parents who have to decide whether to vaccinate their new born child against hepatitis B.

Methods

A DCE asking parents to decide in which scenario they would be more inclined to vaccinate their child against hepatitis B. The stated preference was estimated by comparing the per respondent utility of the most realistic scenario in which parents could choose to vaccinate their child against hepatitis B, with the utility of the opt-out, based on the mixed logit model from the DCE. This stated preference was compared with the actual behaviour of the parents concerning the vaccination of their new born child.

Results

In 80% of the respondents the stated and revealed preferences corresponded. The positive predictive value is 85% but the negative predictive value is 26%.

Conclusions

The predictive value of the DCE in this study is satisfactory for predicting the positive choice but not for predicting the negative choice. However, the behaviour in this study is exceptional in the sense that most people chose to vaccinate. Future studies should focus on behaviours with a larger variance in the population.
Appendix
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Metadata
Title
Consistency between stated and revealed preferences: a discrete choice experiment and a behavioural experiment on vaccination behaviour compared
Authors
Mattijs S Lambooij
Irene A Harmsen
Jorien Veldwijk
Hester de Melker
Liesbeth Mollema
Yolanda WM van Weert
G Ardine de Wit
Publication date
01-12-2015
Publisher
BioMed Central
Published in
BMC Medical Research Methodology / Issue 1/2015
Electronic ISSN: 1471-2288
DOI
https://doi.org/10.1186/s12874-015-0010-5

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