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Re: st: goodness of fit measure fir ivtobit


From   Yuval Arbel <yuval.arbel@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: goodness of fit measure fir ivtobit
Date   Sun, 23 Sep 2012 04:09:25 +0200

Anat,

I checked the -ereturn list- for -ivtobit- and indeed (and unlike
regular tobit) there is no pseudo R-squared measure. If you would
still like to compare between models, you can use the log-likelihood,
which is often available in stata outputs, as a simple measure. You
also have a chi-square statistics for exogeneity testing, which seems
to me more important than a goodness of fit measure.

Finally, note that in many occasions the goodness of fit measures in
these models are quite low (particularly if you have many missing
values in the dependent variables)



On Sun, Sep 23, 2012 at 3:26 AM, Yuval Arbel <yuval.arbel@gmail.com> wrote:
> Hi Anat,
>
> As the first step, I would suggest to use the -ereturn list- command
> to see the full stata output available after -ivtobit-
>
> On Sat, Sep 22, 2012 at 11:33 PM, Anat (Manes) Tchetchik
> <anatmanes@gmail.com> wrote:
>> Dear statalisters,
>>
>> I wonder if anyone knows any goodness of fit that is appropriate for
>> tobit with endogenous
>> variables (ivtobit). Not as in "regular" tobit, stata does not report any
>> goodness of fit measure, any idea how to estimate such a measure?
>> Any response will be greatly appreciated..
>> Best,
>>
>> --
>> 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/statalist/faq
>> *   http://www.ats.ucla.edu/stat/stata/
>
>
>
> --
> Dr. Yuval Arbel
> School of Business
> Carmel Academic Center
> 4 Shaar Palmer Street,
> Haifa 33031, Israel
> e-mail1: yuval.arbel@carmel.ac.il
> e-mail2: yuval.arbel@gmail.com



-- 
Dr. Yuval Arbel
School of Business
Carmel Academic Center
4 Shaar Palmer Street,
Haifa 33031, Israel
e-mail1: yuval.arbel@carmel.ac.il
e-mail2: yuval.arbel@gmail.com
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


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