Re: st: double clustering

[Jeph Herrin <junk@spandrel.net>]

See -xtmixed- and -xtmelogit-.

Orsetta.CAUSA@oecd.org wrote:
> Hello
>
>
> I am running country-by-country regressions on a sample of students, that are
> clustered in schools. I cluster at the school level. Now, if I want to pool
> the countries, I still need to take school cluster into account, but I would
> like to also cluster at the country level. I know that stata allows double
> stage sampling in svy, but I don't think it is correct to consider the
> country as the psu (and the school would be the ssu), because a country is
> not a sampling unit since it is sampled with certainty. 
> I remember having noticed in some old statalist archive that there is a
> user-written double clustering option available (ideally one would want to
> explicit the robust cluster option followed by 2 variables). does anybody has
> a clue on it? What would you suggest to do? (not considering gllam modeling
> since my programs are far too long and heavy and would not run in a gllam
> configuration). 
> Many thanks :)
>
> orsetta
>
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