Title
Model-robust design of conjoint choice experiments Model-robust design of conjoint choice experiments
Author
Faculty/Department
Faculty of Applied Economics
Publication type
article
Publication
New York, N.Y. ,
Source (journal)
Communications in statistics : simulation and computation. - New York, N.Y.
Volume/pages
37(2008) :8 , p. 1603-1621
ISSN
0361-0918
ISI
000259365500010
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Within the context of choice experimental designs, most authors have proposed designs for the multinomial logit model under the assumption that only the main effects matter. Very little attention has been paid to designs for attribute interaction models. In this article, three types of Bayesian D-optimal designs for the multinomial logit model are studied: main-effects designs, interaction-effects designs, and composite designs. Simulation studies are used to show that in situations where a researcher is not sure whether or not attribute interaction effects are present, it is best to take into account interactions in the design stage. In particular, it is shown that a composite design constructed by including an interaction-effects model and a main-effects model in the design criterion is most robust against misspecification of the underlying model when it comes to making precise predictions.
E-info
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