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RE: st: Grid Search in a Log Plus Constant Model


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Grid Search in a Log Plus Constant Model
Date   Thu, 9 Nov 2006 22:25:39 -0000

The key principle is that -glm- (or GLMs) is (or 
are) based on assumptions about the mean response, not the 
response data. Thus some of the data can be 
zeros even if you use a log link. Whether the link
and family chosen are good for the problem and the data 
is naturally an important question, but one that is empirical, 
not theoretical. Or so I understand the matter. 

Nick 
n.j.cox@durham.ac.uk 

David Jacobs
 
> I thought that count estimators would only handle positive 
> integers.  At least that's what the Stata reference books say.  Is 
> GLM an exception?

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