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Re: st: RE: mlogit problem with "predict"


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: mlogit problem with "predict"
Date   Tue, 7 Aug 2007 16:28:10 +0100 (BST)

--- Sheela Athreya <athreya@neo.tamu.edu> wrote:
> The idea that maybe I have an (almost) perfect prediction occurred 
> to me too, but I don't know how to investigate it. Perhaps there is
> an equivalent test to -tab tax pc- that allows me to look at  
> quantitative variables for anything that is off?

One option is to look at dotplots: 
dotplot pc1, over(tax) median
dotplot pc2, over(tax) median
dotplot pc3, over(tax) median
dotplot pc4, over(tax) median

They give you simultaneously an idea about the strength of the
association and the number of observations in each category.

Hope this helps,
Maarten

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


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