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Re: st: RE: power analysis for mixed models


From   Steven Samuels <[email protected]>
To   [email protected]
Subject   Re: st: RE: power analysis for mixed models
Date   Thu, 15 May 2008 12:00:05 -0400

The website for OD ("Optimal Design") is: http://sitemaker.umich.edu/ group-based/optimal_design_software

-Steve
On May 15, 2008, at 11:41 AM, Lachenbruch, Peter wrote:


There is a program OD - it's available through U Michigan Survey
Research Center. The authors are Jessica Spybrook ([email protected]),
Andres Martinez ([email protected]) , Xiaofeng Liu ([email protected] ) and
Stephen Raudenbush ([email protected] ).
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.


Tony

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


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

Hello,

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
you,

May

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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