Re: st: RE: power analysis for mixed models

[Steven Samuels <sjhsamuels@earthlink.net>]

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  
> (jessacah@umich.edu),
> Andres Martinez (amzzz@umich.edu) , Xiaofeng Liu (xliu@gwm.sc.edu )  
> and
> Stephen Raudenbush (sraudenb@uchicago.edu ).
> 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: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of MAY BAYDOUN
> Sent: Thursday, May 15, 2008 8:31 AM
> To: statalist@hsphsun2.harvard.edu
> 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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