In 1970 Davidson generalised the Bradley-Terry model to allow respondents to say that the two options presented in a choice task were equally attractive. In this paper we extend this idea to the MNL model with m options in each choice set and we show that the optimal designs for the MNL model are also optimal in this setting. (C) 2009 Elsevier B.V. All rights reserved.
机构:
School of Mathematical Sciences, University of Technology Sydney, Sydney, NSW 2007School of Mathematical Sciences, University of Technology Sydney, Sydney, NSW 2007