Hi,
A potential client asked for a form of analysis sometimes done in market
research called maximum-difference (maxdiff) analysis. Basically,
consumers are presented with a series of product attributes (say, four
at a time or a "quad") and then are asked to select the one they prefer
the most and the one they prefer the least. For a quad, the other two
non-selected attributes just fall in the middle. This is repeated
several times with the attributes rotating following an experimental
design. Since the attributes are rated, I was thinking of using rologit
to estimate a model. But then I found a statement in the reference
manual that says that "rologit does not allow for other forms of
incompleteness, for instance, data in which respondents indicate which
of four cars they like best, and which one they like least, but not how
they rank the two intermediate cars." But this is exactly my problem.
Does anyone know how to trick rologit, or know of an ado file to handle
this problem?
Thanks,
Walt
--
________________________
Walter R. Paczkowski, Ph.D.
Data Analytics Corp.
44 Hamilton Lane
Plainsboro, NJ 08536
________________________
(V) 609-936-8999
(F) 609-936-3733
[email protected]
www.dataanalyticscorp.com
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