Thank you David, I got a clearer picture about this.
I have one coment on -help xtreg-. In help for -xtreg- there is missing
explanation for option -sa-. I found it, of course, in [XT], but it is
online we usually seek help first.
Best regards
Ineta
>With unbalanced data, -xtreg- with the -sa- option will produce an
estimate of the ICC that is very similar to the one
>produced by -loneway- but not exactly the same. With balanced data,
the estimates will be the same. Until an update in
>the near future, -xtreg ,sa- does not run with a constant only model.
However, we can fit the model by including a
>manually generated constant, as in the output below.
>I hope that this helps.
> David
> [email protected]
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