Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: goodness of fit measure fir ivtobit


From   Austin Nichols <[email protected]>
To   [email protected]
Subject   Re: st: goodness of fit measure fir ivtobit
Date   Sat, 22 Sep 2012 22:49:29 -0400

Anat (Manes) Tchetchik <[email protected]>:
You can always -predict- and compute the squared correlation of
predictions with observed values:
http://www.stata.com/support/faqs/statistics/r-squared/
but are you sure your -ivtobit- model is justified?  What is the
process that results in observations being censored?  I suspect you
have a lower limit at zero which is actually a very low conditional
mean rounded down to zero--am I right?  You may be better off with a
-gmm- model.

On Sat, Sep 22, 2012 at 5:33 PM, Anat (Manes) Tchetchik
<[email protected]> 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..
*
*   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/


© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index