st: Estimating a choice model with allocations

["Data Analytics Corp." <dataanalytics@earthlink.net>]

Hi,

I have a project coming up that has a discrete choice component.  
Doctors will be asked to allocate their next 100 patients to a set of 
medications in a choice set.  Several choice sets will be shown as part 
of an experimental design.  If the doctors are asked to choose just one 
medication, the estimation could be done with clogit.  If they are asked 
to rank the medications in a choice set, then rologit could be used.  
But what about my case where they have to allocate patients and the 
allocations sum to 100?  The allocation will, of course, rank the 
medications, but rologit seems to require numbers such as 1, 2, 3, ..., 
etc.   I'll have 10, 20 31, 5, etc. that will sum to 100.  How can I 
estimate a choice model from this?  Any suggestions?

Thanks,

Walt Paczkowski


--
________________________

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

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