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Re: st: xtnbreg discontinous region encountered after rescaling


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: xtnbreg discontinous region encountered after rescaling
Date   Fri, 10 Dec 2010 17:00:25 +0000 (GMT)

--- On Fri, 10/12/10, hl wrote:
> I am pretty sure the model is appropriate

Your model may or may not be appropriate, but
that does not mean you can estimate it with
your data. A fixed effects negative binomial
requires a lot of information, so I have no 
problem imagining situations where such a model
is theoreticaly appropriate, but unestimatable
even in very large datasets. This reminds me
of the following Tukey quote:

"The combination of some data and an aching 
desire for an answer does not ensure that a
reasonable answer can be extracted from a 
given body of data." ~ John Tukey (1986), 
"Sunset salvo". The American Statistician 
40(1).

-- Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------


      

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