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Re: st: help for using xtmixed


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: help for using xtmixed
Date   Mon, 17 Nov 2008 22:16:24 +0000 (GMT)

Bobby Gutierrez gave what looked like very interesting talks at the
last London Stata Users' Group meeting and Fall North American Stata
Users' Group meetings. I missed both meetings, but the slides look very
interesting and applicable to your situation: 
http://repec.org/fnasug2008/gutierrez.pdf

Hope this helps,
Maarten

--- josemaria <jmpsouza@usp.br> wrote:

> Dear Stata listers:
> I am using xtmixed to compare children growth of two groups
> (variable= 
> group, coded 0|1). The children (variable=  id) were selected within 
> counties (variable= county). Each child were measured (response
> variable= 
> zscore) five times, at ages 6, 10, 14, 18, 22 months (variable= age),
> and I 
> admit that each child has their own growth quadratic curve.
>  Please, is the  -command  xtmixed zscore age agesquared group 
> interactiongroupage interactiongroupagesquared || county: || id: age,
> 
> cov(unstructured) var- adequate?
> Thanks for any help.
> José Maria
> 
> Jose Maria Pacheco de Souza, Professor Titular (aposentado)
> Departamento de Epidemiologia/Faculdade de Saude Publica, USP
> Av. Dr. Arnaldo, 715
> 01246-904  -  S. Paulo/SP - Brasil
> fones  (11)3061-7747; (11)3768-8612
> fax  (11)3714-2403
> www.fsp.usp.br/~jmpsouza 
> 
> 
> 
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
> 


-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room N515

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


      
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



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