Re: st: Margins after mi sqreg

[Alberto Osella <arosella@irccsdebellis.it>]

Il 10/12/2010 11.49, Maarten buis ha scritto:
> --- On Fri, 10/12/10, Alberto Osella wrote:
> > I'm using Stata 11.1 on Windows XP and trying to obtain
> > margins after mi sqreg. Below my code and error:
> >   xi : mi estimate, noisily dftable cmdok: sqreg BMI
> > Etarecl Num_nucleo i.Sesso i.GrammiAlc_G_C 
> > i.NewStatCiv i.Professione1 i.scalacat, q(.47 .83)
> > reps(50)
> >
> >    margins, at(Etarecl0(18/95)) vsquish post
> Two remarks:
> 1) if you want to use margins you should not use -xi-.
> 2) add the -post- option to -mi- and than you'll be
> able to use -margins-.
>
> Hope this helps,
> Maarten
>
> --------------------------
> Maarten L. Buis
> Institut fuer Soziologie
> Universitaet Tuebingen
> Wilhelmstrasse 36
> 72074 Tuebingen
> Germany
>
> http://www.maartenbuis.nl
> --------------------------
>
>
>
>
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Thank you Maarten. I've changed my code (see below) but there is still 
an error.

        mi estimate, noisily post dftable cmdok: sqreg BMI Etarecl 
Num_nucleo ///
         Sesso GrammiAlc_G_C  NewStatCiv Professione1 ///
         scalacat, q(.47 .83) reps(50)
          margins, at(Etarecl=(18/95)) vsquish

Warning: cannot perform check for estimable functions.
e(sample) does not identify the estimation sample
r(322);


--
Alberto R. Osella, MD, PhD
Laboratorio di Epidemiologia e Biostatistica
IRCCS Saverio de Bellis
Via Turi, 27
70013 Castellana Grotte (BA)
Italia
Tel:    +39 0804994655
Fax:    +39 0804994650
e-mail: arosella@irccsdebellis.it


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