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RE: st: xtmelogit


From   "Szabo S.M." <S.M.Szabo@soton.ac.uk>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: xtmelogit
Date   Wed, 14 Nov 2012 09:22:19 +0000

Thank you getting back, I will try Laplace.

Regards,
S.

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of JVerkuilen (Gmail)
Sent: 14 November 2012 00:45
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: xtmelogit

On Tue, Nov 13, 2012 at 4:22 PM, Szabo S.M. <S.M.Szabo@soton.ac.uk> wrote:
> Dear STATA Listers,
>
> I wanted to inquire whether anyone else had a problem using xtmelogit command. I am trying to fit a couple of multilevel logistic models and it takes a (very) long time to obtain output (including interactions, random effects, unstructured covariance and odds ratio options).
>
> This has lead me to a frustration and considering switching to MLWin, although I have traditionally used STATA.

Sounds like you're trying to fit a very complex model, which will take a long time due to the fact that adaptive quadrature is being used by -xtmelogit-. You may want to switch to the Laplace approximation to see if that speeds things up and then use adaptive quadrature only on the final model.

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