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Re: st: xtmixed

From   Joseph Coveney <>
To   Statalist <>
Subject   Re: st: xtmixed
Date   Mon, 10 Jul 2006 19:35:21 +0900

Maria Bonanomi wrote:

How can I retrive the estimates of random-effects paramaters after using the
xtmixed command? I would like to use the estimates to calculate intraclass
correlation coefficients. I also want to apply a bootstrap routine to
calculate ICC confidence intervals.


They're returned in e(b), along with the coefficients for the fixed effects.
See -help ereturn-.  Note that you'll need to exponentiate the values.

According to the help file for -xtmixed-, bootstrapping is allowed.  For
how, see -help prefix- or -help bootstrap-.  I'd be curious to see how well
it works here.

There are several helpful discussions of intraclass correlation in
S. Rabe-Hesketh & A. Skrondal, _Multilevel and Longitudinal Modeling Using
Stata_ (College Station, Texas: Stata Press, 2005).

Joseph Coveney

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