Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: HELP: NEGATIVE BINOMIAL


From   grsanta@unict.it
To   statalist@hsphsun2.harvard.edu
Subject   st: HELP: NEGATIVE BINOMIAL
Date   Tue, 4 Feb 2003 20:01:55 +0100

I am trying to run a regression model having as depedent variable a count
variable. The mean of this variable is 0.344 and the variance 0.745. I have
tried to fit a negative binomial model to the data, but the alfa test is not
significant, while the goodness of fit of the poisson model is much better.
However, when I used the nbvargr command to obtain the parameter estimates and
the relative graph the negative binomial distribution seems to fit better the
data. Am I missing something?

Many thanks

Grazia


-------------------------------------------------
UniversitÓ di Catania - C.E.A.
Servizio di WebMail
http://www.cea.unict.it

----- End forwarded message -----




-------------------------------------------------
UniversitÓ di Catania - C.E.A.
Servizio di WebMail
http://www.cea.unict.it
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index