Understood. But the on-line help is part
of the documentation, and should be accessible
to you. -whelp xtgee- gives the outline. Otherwise
it's down to the library for a book on GEE.
Nick
[email protected]
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of
> Clive Nicholas
> Sent: 30 October 2003 18:47
> To: [email protected]
> Subject: Re: st: RE: [correlation structures]
>
>
> Nick,
>
> Would love to, but don't have the documentation. I've
> already spent more
> than enough on software and other Stata books. :-)
>
> C.
>
> > 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.
> >> >
> >
> > *
> > * For searches and help try:
> > * http://www.stata.com/support/faqs/res/findit.html
> > * http://www.stata.com/support/statalist/faq
> > * http://www.ats.ucla.edu/stat/stata/
> >
>
>
> Yours,
> CLIVE NICHOLAS,
> Politics Building,
> School of Geography, Politics and Sociology,
> University of Newcastle-upon-Tyne,
> Newcastle-upon-Tyne,
> NE1 7RU,
> United Kingdom.
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
