st: sample size estimates for multilevel models

[Richard Goldstein <richgold@ix.netcom.com>]

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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