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Re: st: sample size estimates for multilevel models

From   Richard Goldstein <>
Subject   Re: st: sample size estimates for multilevel models
Date   Wed, 13 May 2009 13:26:24 -0400

Thanks but ...

Although I bought the biggest Mac available, and although I have attached external hard drives, and will need to attach some more, I still don't really want to give up any room to any version of Windows -- esp. since my dislike of Windows and its instability were what moved me to the Mac

If I have to do that I will -- but I definitely don't want to do that


David Airey wrote:

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?


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.


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