Re: st: why is there no weight option in -esize-?

["Chuck Huber, StataCorp LP" <chuber@stata.com>]

I just returned from the APA conference and wanted to respond to Ariel 
Linden's question.  Ariel Linden asked the following:

> Can anyone think of a reason why the new effect size estimator in version
> 13.0 -esize-, is not programmed to accept weights? I cannot think of a
> statistical limitation, but perhaps I am missing something?


The effect size estimates could be calculated easily using weights. 
However, the confidence intervals are calculated by finding the 
non-centrality parameters of a non-central t distribution that 
correspond to the alpha/2 and 1-alpha/2 tail probabilities.  I am not 
aware of any papers that describe how to incorporate weights into this 
method but I would be grateful to be enlightened.


Chuck


StataCorp
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