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Re: st: influential cases - xtnbreg


From   Steve Samuels <sjsamuels@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: influential cases - xtnbreg
Date   Thu, 15 Mar 2012 17:51:46 -0400

I just posted a response which shows how to compute dfbetas for -stcox- 

(http://www.hsph.harvard.edu/cgi-bin/lwgate/STATALIST/archives/statalist.1203/date/article-664.html)

and it should also work for -xtnbreg-

Steve
sjsamuels@gmail.com

On Mar 15, 2012, at 7:36 AM, <a.l.montoya@utwente.nl>  wrote:

I have identified  some outliers in my dataset but now I want to know whether they are influential points as well.

There are plenty of ways to do this using regress but I am using xtnbreg and so far I did not come across any test like the Cook's test that applies to xtnbreg. Can someone suggest how should I proceed?

Thanks

Lorena Montoya
researcher
University of Twente 
The Netherlands


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