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Re: st: Problem with variables in glamm


From   William Buchanan <william@williambuchanan.net>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Problem with variables in glamm
Date   Mon, 7 Oct 2013 07:30:50 -0500

If your dependent variable is binary (like it is implied by the info you provide), then the only values it should take are 0 & 1.  Beyond that it isn't exactly clear what your specific problem is. You should also include the _exact_ syntax you enter and the exact message/output provided by Stata.

Sent from my iPhone

> On Oct 7, 2013, at 6:53, "Alice Dalton (MED)" <A.Dalton@uea.ac.uk> wrote:
> 
> Dear Statlist,
> 
> I'm having a problem with the gllamm program (family(binomial) link(logit)).
> 
> 1. My dependant variable (a proportion) will only work if the variable contains a zero, otherwise I get an r(2000) (no observations) error
> 
> 2. Adding binary explanatory variables (eg a health variable where 1 excellent, 0 not excellent) results in the message 'variables have been dropped, can't continue' and an r(198) error. The null model works; the null model works with continuous variables added in; the null model plus one or more binary variables fails.
> 
> The command I am using is     gllamm  [depvar] [varlist], i(ParticipantId) family(binomial) link(logit). I have 276 cases and 129 variables (not all of which are added to the model).
> 
> If anyone with experience of gllamm has an idea of what is happening here, I would be most grateful to hear it. 
> 
> Thank you!
> 
> Alice Dalton
> 
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