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


From   "Kieran McCaul" <kamccaul@meddent.uwa.edu.au>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: suggested references about the variables to include in zero-inflated portion of zinb?
Date   Fri, 24 Oct 2008 13:50:03 +0800

OK, I don't know if this will help, but have a look at:

Cameron AC and Trivedi PK (1998).  Regression analysis of count data.
New York, Cambridge University Press.

______________________________________________
Kieran McCaul MPH PhD
WA Centre for Health & Ageing (M573)
University of Western Australia
Level 6, Ainslie House
48 Murray St
Perth 6000
Phone: (08) 9224-2140
Fax: (08) 9224 8009
email: kamccaul@meddent.uwa.edu.au
http://myprofile.cos.com/mccaul 
_______________________________________________
The fact that no one understands you doesn't make you an artist.

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Tim Hale
Sent: Friday, 24 October 2008 1:19 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: suggested references about the variables to include in
zero-inflated portion of zinb?

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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