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Re: st: Regression Equation in ZINB regression


From   rachel grant <rachelannegrant@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Regression Equation in ZINB regression
Date   Tue, 20 Sep 2011 11:33:19 +0100

Thank you Partho. Thank you all for your patience.
I have now understood that I cannot get Stata to do this and I need to
reconstruct by inserting my co-efficients into the equation. Fine

Now the problem I have is finding a general equation for ZINB in order
to reconstruct.
Is the general equation for ZINB the same as Poisson? I cannot find
anywhere a general equation for ZINB.
I could use a general log-linear Poisson type equation but would this
be correct? and how do I deal with the inflated part, is this merely a
seperate log-linear eqn, or is it incorporated into th general ZINB
eqn. Thanks, Rachel

On 19 September 2011 08:13, Partho Sarkar <partho.ss+lists@gmail.com> wrote:
> Hi Rachel
>
> Just to clarify: in order to actually get the "regression equation",
> by which I assume you mean something like
>
> yhat=12.56+2.6*x1+0.34*x2 ,
>
> you do need to reconstruct the equation form the output displayed (as
> exemplified by Anees's results).  You could see this page for an
> example: http://dss.princeton.edu/online_help/analysis/interpreting_regression.htm
> .
>
> With a little more programming effort, this process could be automated
> using e-class macros etc.  (There is very probably a user-written
> program to do this somewhere out there- -estadd- from here
> http://repec.org/bocode/e/estout/ might help partly, and you can
> search the rich REPEC archives).
>
> (In this sense Stata may not be as "user friendly" as Minitab or even
> some more ambitious  other packages, which helpfully report the exact
> "prediction equation" in the form you might want, but then it can do
> so much more besides!)
>
> Hope this helps
>
> Partho
>
>> On Mon, Sep 19, 2011 at 12:34 AM, rachel grant <rachelannegrant@gmail.com> wrote:
>>>
>>> I have searched the help files but I cannot understand how to get
>>> Stata to display the regression equation.
>>> If anyone is able to help, without referring me to manual, it would be
>>> really appreciated.
>>>
>>> --
>>> regards, Rachel Grant
>>> *
>>> *   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/
>>
>
> *
> *   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/
>



-- 
regards, Rachel

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
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