Re: st: estat icc

[Roberto Ferrer <refp16@gmail.com>]

This example works for me. Does it for you?

*------------------- begin code -------------------
clear
webuse nlswork
xtmixed ln_w grade age c.age#c.age ttl_exp tenure c.tenure#c.tenure ||
id: tenure
estat icc
*-------------------- end code -------------------------



On Wed, Oct 30, 2013 at 4:36 PM, sbs <sbsamblanet@gmail.com> wrote:
> Hello,
>
> I am attempting to use the postestimation command "estat icc" after using
> xtmixed for a mixed model. However, each of my attempts ends with this
> error:
>
> . estat icc
> invalid subcommand icc
> r(321);
>
>
> -------------------------------------------------------------------------------
> search for r(321)                                         (manual:  [R]
> search)
> -------------------------------------------------------------------------------
>
>         Keywords:  r(321)
>           Search:  (1) Official help files, FAQs, Examples, SJs, and STBs
>
>
> Search of official help files, FAQs, Examples, SJs, and STBs
>
> [P]     error . . . . . . . . . . . . . . . . . . . . . . . .  Return code
> 321
>         requested action not valid after most recent estimation command;
>         This message can be produced by predict or test and indicates
>         that the requested action cannot be performed.
>
> (end of search)
>
>
> I am confused by this error since I found the estat icc command in
> documentation specific to xtmixed postestimations published by Stata.
> Specifically, the documentation says:
>
> estat icc displays the intraclass correlation for pairs of responses at
> each nested level of the model. Intraclass correlations are available for
> random-intercept models or for random-coefficient models conditional on
> random-effects covariates being equal to zero. They are not available
> for crossed-effects models or with residual error structures other than
> independent structures.
>
> Is there some reason why I would not be able to use estat icc? I am using
> Stata 12.
>
> Thank you for your help.
>
>
>
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