Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, is already up and running.

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

st: Quadratic term in ZIP model

From   Asaduzzaman Khan <>
To   statalist <>
Subject   st: Quadratic term in ZIP model
Date   Sat, 16 Oct 2010 15:52:12 -0700 (PDT)

Hi all
I've fitted a zero-inflated Poisson (ZIP) model where I had to include a significant quadratic term (e.g. age, age^2) to have a better fit. Can anyone help me with the interpretation of the overall effect of age on the counts? Any suggestion would be greatly appreciated.
Many thanks
Asad Khan
University of Queensland


*   For searches and help try:

© Copyright 1996–2016 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index