Does it converge if you leave out the -cov(un)- option?
--Maarten
--- Jennifer Manuel <[email protected]> wrote:
> I am estimating a mixed-effects logistic regression model using
> xtmelogit. I'm examining the impact of two case management models on
> medication adherence among 198 individuals who were followed over a
> 3-year period. In estimating the model, I am getting the message
> "initial values not feasible" r(1400). The output is below. I've
> searched the listserv and have tried to use starting values from a
> simpler model using the from() option, but I still get the same error
> message. I would be grateful for any advice on what I'm doing wrong.
>
> . xtmelogit nonadherencemo interval trtcond txBYintvl || id:
> interval,
> cov(un) var
>
> Refining starting values:
>
> initial values not feasible
> r(1400);
>
> Thank you,
> Jennifer
>
> *
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>
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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