[Limdep Nlogit List] Best-worst estimation

[Data Analytics Corp.]

Hi

A potential client asked for a form of analysis done in market research 
called best-worst or maximum-difference (maxdiff) analysis.  Basically, 
consumers are presented with a choice set containing a series of product 
attributes (say, four at a time or a "quad") and then are asked to 
select the one from the choice set they prefer the most and the one they 
prefer the least; the other items in the choice set are not ranked.  For 
a quad, the other two non-selected attributes just fall in the middle 
with no specific ranking (maybe we can asume they are ties?).  As an 
example, consumers may be asked to rank four marketing messages in a 
choice set.  They select the message they like the most and the one they 
like the least.  This is repeated several times with the messages 
rotating following an experimental design just as in a regular discrete 
choice problem.  So, in essence, this is a discrete choice problem with 
an incomplete ranking.  Does anyone know how to handle this problem in 
Limdep?  Sawtooth Software has a program to do this using hierarchical 
Bayes estimation to give utilities (coefficients) for each individual, 
which is what I actually need for other work for this problem.  So, 
whatever I do in Limdep, I'd like to be able to get the utilities 
(coefficients) at the individual level.

Thanks,

Walt

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________________________

Walter R. Paczkowski, Ph.D.
Data Analytics Corp.
44 Hamilton Lane
Plainsboro, NJ 08536
________________________
(V) 609-936-8999
(F) 609-936-3733
dataanalytics at earthlink.net
www.dataanalyticscorp.com