Nick,
For all intents and purposes, I practically *am* the library for Stata
books. Not a single book by or on Stata is available at any of Newcastle
University's libraries.
C.
> 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/
>
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/
