Can a Repeated Opt-Out Reminder mitigate hypothetical bias in discrete choice experiments? An application to consumer valuation of novel food products

2018 ◽  
Vol 45 (5) ◽  
pp. 749-782 ◽  
Author(s):  
Mohammed H Alemu ◽  
Søren B Olsen
Keyword(s):  
Discrete Choice ◽  
Food Products ◽  
Choice Experiments ◽  
Hypothetical Bias ◽  
Discrete Choice Experiments ◽  
Novel Food ◽  
Consumer Valuation ◽  
Opt Out

Designing Unforced Choice Experiments to Inform Health Care Decision Making: Implications of Using Opt-Out, Neither, or Status Quo Alternatives in Discrete Choice Experiments

2019 ◽  
Vol 39 (6) ◽  
pp. 681-692 ◽  
Author(s):  
Domino Determann ◽  
Dorte Gyrd-Hansen ◽  
G. Ardine de Wit ◽  
Esther W. de Bekker-Grob ◽  
Ewout W. Steyerberg ◽  
...  
Keyword(s):  
Health Care ◽  
Decision Making ◽  
Discrete Choice ◽  
Choice Experiments ◽  
Status Quo ◽  
Discrete Choice Experiments ◽  
Health Care Market ◽  
Health Care Decision ◽  
Opt Out ◽  
Care Decision

Background. Discrete choice experiments (DCEs) are increasingly used in the health care context to inform on patient preferences for health care services. In order for such experiments to provide useful and policy-relevant information, it is vital that the design includes those options that the respondent faces in the real-life situation. Whether to include opt-out, neither, or status quo alternatives has, however, received little attention in the DCE literature. We aim to investigate whether the use of different unforced choice formats affects DCE results in different settings: 1) opt-out versus neither in a health care market where there is no status quo and 2) including status quo in addition to opt-out in a health care market with a status quo. Design. A DCE on Dutch citizens’ preferences for personal health records served as our case, and 3189 respondents were allocated to the different unforced choice formats. We used mixed logit error component models to estimate preferences. Results. We found that the use of different unforced choice formats affects marginal utilities and welfare estimates and hence the conclusions that will be drawn from the DCE to inform health care decision making. Conclusions. To avoid biased estimates, we recommend that researchers are hesitant to use the neither option and consider including a status quo in addition to opt-out in settings where a status quo exists.

A query theory account of a discrete choice experiment under oath

2019 ◽  
Vol 47 (3) ◽  
pp. 1133-1172
Author(s):  
Nathan P Kemper ◽  
Jennie S Popp ◽  
Rodolfo M Nayga
Keyword(s):  
Discrete Choice Experiment ◽  
Discrete Choice ◽  
Choice Experiment ◽  
Stated Preference ◽  
Choice Experiments ◽  
Hypothetical Bias ◽  
Discrete Choice Experiments ◽  
Thought Processes ◽  
Stated Preference Methods ◽  
Ex Ante

Abstract One limitation of stated-preference methods is the formation of hypothetical bias. To address this, the honesty oath has been used as an ex ante technique to reduce hypothetical bias. Our study provides a query account of the honesty oath in a discrete-choice experiment setting by using Query Theory to examine the mechanism behind the effectiveness of the honesty oath. Our results show that the honesty oath can change the content and order of queries; potentially reducing hypothetical bias in discrete choice experiments. The study suggests the potential usefulness of Query Theory in examining thought processes of respondents in valuation studies.

scholarly journals The Effect of Including an Opt-Out Option in Discrete Choice Experiments

PLoS ONE ◽  
2014 ◽  
Vol 9 (11) ◽  
pp. e111805 ◽  
Author(s):  
Jorien Veldwijk ◽  
Mattijs S. Lambooij ◽  
Esther W. de Bekker-Grob ◽  
Henriëtte A. Smit ◽  
G. Ardine de Wit
Keyword(s):  
Discrete Choice ◽  
Choice Experiments ◽  
Discrete Choice Experiments ◽  
Opt Out

scholarly journals The effect of including an opt-out option in discrete choice experiments

2013 ◽  
Vol 16 (3) ◽  
pp. A46 ◽  
Author(s):  
J Veldwijk ◽  
MS Lambooij ◽  
E de Bekker-Grob ◽  
HA Smit ◽  
GA de Wit
Keyword(s):  
Discrete Choice ◽  
Choice Experiments ◽  
Discrete Choice Experiments ◽  
Opt Out
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