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st: Applying DESMAT to Log-linear saturated models


From   marcus.keupp@unisg.ch
To   statalist@hsphsun2.harvard.edu
Subject   st: Applying DESMAT to Log-linear saturated models
Date   Thu, 9 Sep 2004 18:42:12 +0200

Dear Listers,

I have a somewhat technical question.

At the UCLA Stata FAQ site, it can be read that Hendrickx's 
DESMAT be used to generate a saturated model for
Agresti's afterlife data.

(see http://www.ats.ucla.edu/stat/stata/faq/desmat_saturated_Model.htm)

However, isn't this inappropriate when fitting a saturated model
for a contingency table? Using DESMAT POISSON would indicate
that count is the dependent variable with error terms poisson distributed.

In addition to that, the output shows "model degrees of freedom=11", 
however
the saturated model has 0 df by definition as it fits the data perfectly.

Maybe I am so wrong or stupid or both that I don't get it, but I'd really
appreciate your comments.

Best regards,
Marcus

___________________________________
Marcus Matthias Keupp, Dipl.-Kfm.
Research Associate
University of St. Gallen
Institute of Technology Management
Dufourstrasse 40a
CH-9000 St. Gallen / Switzerland
Tel. +41 (0)71 224 7236
Fax +41 (0)71 224 7301
www.item.unisg.ch

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