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Re: st: sample size estimates for multilevel models


From   David Airey <david.airey@Vanderbilt.Edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: sample size estimates for multilevel models
Date   Wed, 13 May 2009 12:17:58 -0500

.

I run software on Windows on my Mac as needed, like SAS. Works fine with Parallels 4 and XP or Vista. If you still have your valid licenses, why not use them?

-Dave


On May 13, 2009, at 12:02 PM, Richard Goldstein wrote:


Having recently switched from Windows to a Mac, I find myself missing one thing from the Windows world -- software for sample size estimation for multilevel models (models that one would use, e.g., - xtmixed- or -gllamm- for).

I find that, within Stata, I can get what appears to be a reasonable estimate by -sampsi- for repeated measures and following this with Joanne Garrett's -sampclus- (from STB 60). However, I would like to check the reasonableness of the answer if possible either within Stata or with Mac software (if any).

Any suggestions are very welcome.

Thanks,

Rich
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