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Re: st: Regression Equation in ZINB regression


From   Partho Sarkar <partho.ss+lists@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Regression Equation in ZINB regression
Date   Tue, 20 Sep 2011 16:19:41 +0530

My post crossed yours in the mail!  Hope you can manage now.

Partho

On Tue, Sep 20, 2011 at 4:03 PM, rachel grant <rachelannegrant@gmail.com> wrote:
> 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
> *   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/


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