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Re: st: glm error message after binomial ...


From   rgutierrez@stata.com (Roberto G. Gutierrez, StataCorp)
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: glm error message after binomial ...
Date   Mon, 18 Feb 2008 15:43:32 -0600

Jane Schroeder <Jane_Schroeder@unc.edu> writes:

> When I run binomial -glm- models with a log or identity link function I get
> the following error message whenever there are observations with missing
> data for a model covariate, even though all predicted risks are well within
> the permissible (0,1) range:

> Warning: parameter estimates produce inadmissible mean estimates in one or
> more observations.

[...]

and Maarten L. Buis <maartenbuis@yahoo.co.uk> replied:

> I think StataCorp forgot a -if e(sample)- in lines 1512 and 1516 of glm.ado
> (you can see that when you type -viewsource glm.ado-).  you can perform this
> test yourself by typing after -glm-:

> predict mu, mu
> assert mu >= 0 & mu <= 1 if e(sample)

Maarten is right, and we'll get this fixed in the next ado update.  In the
meantime, if Jane performs Maarten's suggested check she can safely ignore the
warning.

--Bobby
rgutierrez@stata.com
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