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st: RE: power analysis for mixed models

From   "Lachenbruch, Peter" <>
To   <>
Subject   st: RE: power analysis for mixed models
Date   Thu, 15 May 2008 08:41:42 -0700

There is a program OD - it's available through U Michigan Survey
Research Center.  The authors are Jessica Spybrook (,
Andres Martinez ( , Xiaofeng Liu ( ) and
Stephen Raudenbush ( ).  
It's based on work by Raudenbush and colleagues.  It's pretty easy to
use, but you need to figure out what the 'right' values of some
parameters are.


Peter A. Lachenbruch
Department of Public Health
Oregon State University
Corvallis, OR 97330
Phone: 541-737-3832
FAX: 541-737-4001

-----Original Message-----
[] On Behalf Of MAY BAYDOUN
Sent: Thursday, May 15, 2008 8:31 AM
Subject: st: power analysis for mixed models


I was wondering if there is an easy way to calculate
power for mixed models in Stata using a similar method
as the one for stpower. I know there is a command for
repeated measures but not for xtmixed or xtreg. Thank


May Baydoun, PhD in Epidemiology (UNC-Chapel Hill)  Staff Scientist,
National Institute on Aging, NIH/IRP,  Biomedical Research Center,
Baltimore, MD

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