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Re: st: AW: Multiple group latent growth models with xtmixed


From   John Holmes <johnholmesyork@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: AW: Multiple group latent growth models with xtmixed
Date   Mon, 23 Nov 2009 17:17:53 +0000

Yes, unfortunately the Gutierrez presentation doesn't cover this.  It
analyses boys and girls separately but only for the variance structure
not as a fully grouped model (i.e. it doesn't produce separately
estimated boy/girl coefficients for the other covariates).

John

2009/11/23 Martin Weiss <martin.weiss1@gmx.de>:
>
> <>
>
> Have you taken account of the tricks in
> http://www.stata.com/meeting/fnasug08/gutierrez.pdf ?
>
>
>
> HTH
> Martin
>
>
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von John Holmes
> Gesendet: Montag, 23. November 2009 18:09
> An: statalist
> Betreff: st: Multiple group latent growth models with xtmixed
>
> Hi,
>
> I have been estimating latent growth models using -xtmixed- with a
> continuous income measure as the dependent variable and long-term
> family status (14 categories) as an independent variable.  However, I
> am wanting to estimate simultaneous models for two separate groups -
> those poor at time=0 and those not poor at time=0.  Is this possible
> using xtmixed?  I appreciate that I could simply include 'poor' as a
> covariate or estimate two separate models but I want to obtain a
> robust multiple groups analysis with parameters estimated separately
> for each group rather than uniformly modified by group.
>
> My syntax (with simplified variable names) for the non-groups model is:
>
> xtmixed income familytype2-familytype14
> familytype2BYtime-familytype14BYtime time ///
>         || id: time, cov(un) var mle
>
> I'd be grateful if anyone could show me how to do the syntax for a
> grouped model.
>
> --
> John Holmes
>
> Research Associate
> Institute for Social Change
> University of Manchester
> 4th Floor Arthur Lewis Building
> Oxford Road
> Manchester
> M13 9PL
>
> Email: johnholmesyork@gmail.com
>
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-- 
John Holmes

Research Associate
Institute for Social Change
University of Manchester
4th Floor Arthur Lewis Building
Oxford Road
Manchester
M13 9PL

Email: johnholmesyork@gmail.com

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