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dc.contributor.author Cook, J
dc.contributor.author Jeuland, M
dc.contributor.author Maskery, B
dc.contributor.author Whittington, D
dc.date.accessioned 2012-11-07T20:50:48Z
dc.date.issued 2012-04-01
dc.identifier.citation Environmental and Resource Economics, 2012, 51 (4), pp. 473 - 496
dc.identifier.issn 0924-6460
dc.identifier.uri http://hdl.handle.net/10161/5985
dc.description.abstract Previous studies have found that contingent valuation (CV) respondents who are given overnight to reflect on a CV scenario have 30-40% lower average willingness-to-pay (WTP) than respondents who are interviewed in a single session. This "time to think" (TTT) effect could explain much of the gap between real and hypothetical WTP observed in experimental studies. Yet giving time to think is still rare in binary or multinomial discrete choice studies. We review the literature on increasing survey respondents' opportunities to reflect on their answers and synthesize results from parallel TTT studies on private vaccine demand in four countries. Across all four countries, we find robust and consistent evidence from both raw data and multivariate models for a TTT effect: giving respondents overnight to think reduced the probability that a respondent said he or she would buy the hypothetical vaccines. Average WTP fell approximately 40%. Respondents with time to think were also more certain of their answers, and a majority said they used the opportunity to consult with their spouse or family. We conclude with a discussion of why researchers might be hesitant to adopt the TTT methodology. © 2011 Springer Science+Business Media B.V.
dc.format.extent 473 - 496
dc.relation.ispartof Environmental and Resource Economics
dc.relation.isversionof 10.1007/s10640-011-9508-4
dc.title Giving Stated Preference Respondents "Time to Think": Results From Four Countries
dc.type Journal Article
duke.description.endpage 496 en_US
duke.description.issue 4 en_US
duke.description.startpage 473 en_US
duke.description.volume 51 en_US
dc.relation.journal ENVIRONMENTAL AND RESOURCE ECONOMICS en_US
pubs.issue 4
pubs.organisational-group /Duke
pubs.organisational-group /Duke/Institutes and Provost's Academic Units
pubs.organisational-group /Duke/Institutes and Provost's Academic Units/University Institutes and Centers
pubs.organisational-group /Duke/Institutes and Provost's Academic Units/University Institutes and Centers/Global Health Institute
pubs.organisational-group /Duke/Nicholas School of the Environment
pubs.organisational-group /Duke/Nicholas School of the Environment/Environmental Sciences and Policy
pubs.organisational-group /Duke/Pratt School of Engineering
pubs.organisational-group /Duke/Pratt School of Engineering/Civil and Environmental Engineering
pubs.organisational-group /Duke/Sanford School of Public Policy
pubs.organisational-group /Duke/Sanford School of Public Policy/Duke Population Research Institute
pubs.organisational-group /Duke/Sanford School of Public Policy/Duke Population Research Institute/Duke Population Research Center
pubs.publication-status Published
pubs.volume 51

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