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Re: st: Change in QIC output
From
Steve Samuels <[email protected]>
To
[email protected]
Subject
Re: st: Change in QIC output
Date
Tue, 25 May 2010 12:09:05 -0400
Pamela, see section 8.2 of the FAQ (http://www.stata.com/support/statalist/faq)
Steve
On Tue, May 25, 2010 at 5:28 AM, Pamela Phillips <[email protected]> wrote:
>
> Dear Statalist,
>
> In October 2008 I fitted some Poisson generalised linear models using
> generalised estimating equations. I calculated the QIC (quasilikelihood
> information criterion) for each model, using the qic command in STATA.
>
> On revisiting the same datasets and the same code in April 2010, I find
> that the QIC values have changed by a factor of 1.5. The command output is
> the same, except for the first line, which has changed from 'Iteration 1:
> tolerance = 1.166e-11' to 'Iteration 1: tolerance = 2.528e-12'.
>
> Can anyone tell me what has happened? Have any default settings been
> changed for the qic command? I am using STATA 10.0.
>
> Many thanks,
> Pamela
>
> *
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>
--
Steven Samuels
[email protected]
18 Cantine's Island
Saugerties NY 12477
USA
Voice: 845-246-0774
Fax: 206-202-4783
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/