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st: Ologit question


From   "Anat (Manes) Tchetchik" <anatmanes@gmail.com>
To   statalist@hsphsun2.harvard.edu
To   statalist@hsphsun2.harvard.edu
Subject   st: Ologit question
Date   Wed, 31 Oct 2012 19:44:11 +0200
Date   Wed, Oct 31, 2012 at 7:33 PM

Thanks,  I ran the Brant test of parallel regression assumption and it
turned out insignif. (p>chi2=0.877) does it supprt the use of ologit?
Also- what is the main difference between the ologit and rologit? The
data I have  actually refer to 3 groups of 50 observations each
(cardiology, oncology and orthopedic) I currently used dummy vars. to
control for this, maybe the ranked ordered logit is more appropriate?

On Wed, Oct 31, 2012 at 6:59 PM, JVerkuilen (Gmail)
<jvverkuilen@gmail.com> wrote:
>
> On Wed, Oct 31, 2012 at 10:09 AM, Anat (Manes) Tchetchik
> <anatmanes@gmail.com> wrote:
> > No,  I have no weighting term and havn't drop any case (I have 148 obs.)
>
> Ah, from looking at your model you have a lot of variables for the
> number of cases and asymptotic tests may be dubious even if they are
> syntactically correct. Given that the thresholds are reasonably
> symmetric you might want to try a few different merges of the
> categories and use logit or even run linear regression with
> bootstrapped standard errors. The distribution looks like it's
> reasonably symmetric from the ologit cutpoints. Even if you intend to
> keep the ologit model in the end, checking from a few different angles
> won't hurt.
> *
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--
Anat Tchetchik, PhD
Department of Hotel and Tourism Management
Guilford Glazer Faculty of Business and Management
Ben-Gurion University of the Negev
P.O.Box: 653
Beer-Sheva, Israel, 84105

E-mail:       anat@som.bgu.ac.il
Phone         972-(0)8-6479735
Fax:           972-(0)8-6472920
Web:          http://cmsprod.bgu.ac.il/Eng/som/hotelmanage/Staff/Academic/ChechikA.htm




--
Anat Tchetchik, PhD
Department of Hotel and Tourism Management
Guilford Glazer Faculty of Business and Management
Ben-Gurion University of the Negev
P.O.Box: 653
Beer-Sheva, Israel, 84105

E-mail:       anat@som.bgu.ac.il
Phone         972-(0)8-6479735
Fax:           972-(0)8-6472920
Web:          http://cmsprod.bgu.ac.il/Eng/som/hotelmanage/Staff/Academic/ChechikA.htm
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/


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