This refers to correlation structures
in time. For more details, see the documentation
on -xtgee-.
Nick
[email protected]
Clive Nicholas
>
> Forgive me for being thick, but how many different 'structures of
> correlation' are there? I'm only aware of two: bivarate and
> canonical!
>
>
> >>> (1) I cannot successfully fit an -xtgee- model (ie,
> xtgee [depvar]
> >>> [varlist], family(binomial) link(probit) i(id)
> t(waves38)). All I get
> >>> is
> >>> this error message: "estimates diverging (absolute
> correlation > 1)
> >>> r(430);". Uhh? And how can this be got round?
> >
> > You don't mention what correlation structure you are
> specifying. I often
> > have this problem when I specify unstructured correlation
> - which is the
> > most general. If this is the case, you may solve your
> problem by trying a
> > different (appropriate) correlation structure.
> >
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