Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: gllamm and mim output for multi-level model


From   Christian Villenas <cvillenas@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: gllamm and mim output for multi-level model
Date   Mon, 18 Oct 2010 09:34:45 -0400

Stas-
Thanks so much for your response. I guess for me the confusion still
lies in the output. If it's a matter of learning Cholesky
decomposition, why does the gllamm output (without mim) provide the
variances/covariances? Are you saying that I need to learn Cholesky
decomposition in order to somehow aggregate the imputed data to get
the  level 1 and 2 variance/covariances?

Thanks

Christian

On Fri, Oct 15, 2010 at 3:12 PM, Stas Kolenikov <skolenik@gmail.com> wrote:
> On Fri, Oct 15, 2010 at 12:57 PM, Christian Villenas
> <cvillenas@gmail.com> wrote:
>> I am working on a project that uses both gllamm and mim commands. When
>> running my models, I notice that the level 1 and 2
>> variance/covariances, as well as random effects are missing from the
>> output. Instead I get coefficients for the level 2 identifier and
>> random effects. What do those coefficients mean, and can I use them to
>> obtain the variance/covariance as per the gllamm output without the
>> mim command?
>
> You'd need to learn the internal parametrization used by -gllamm-.
> Level 2 is parametrized via Cholesky decomposition, so the variances
> and covariances are not directly available.
>
> --
> Stas Kolenikov, also found at http://stas.kolenikov.name
> Small print: I use this email account for mailing lists only.
> *
> *   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/
>

*
*   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/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index