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st: suggested references about the variables to include in zero-inflated portion of zinb?


From   Tim Hale <timhale@uab.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: suggested references about the variables to include in zero-inflated portion of zinb?
Date   Fri, 24 Oct 2008 00:18:51 -0500

I am using zinb to estimate level of psychological distress (scores range from 0-24) using various demographic variables and measures of use of the Internet. I've used -countfit- to compare various count models and the results support zinb as the best fitting model.

I am uncertain, however, about how to justify the variables that I include in the zero-inflated part of the model. I've read journal articles that have used zinb, read the book by Freese and Long, and searched the Internet and Statalist but I have not been able to find any detailed recommendations or procedures. Can anyone suggest any other sources (books or journals) that provide an explanation or a good example of this process?

Ideally I would like to find a good source that I can cite in the paper -- but I appreciate any suggestions about this you might have.

Thanks for you help,
Tim

-----------------------------------------------------
Timothy M. Hale, MA
Graduate Assistant
University of Alabama at Birmingham
Department of Sociology
email:  timhale@uab.edu

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