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Re: st: Change in QIC output


From   Steve Samuels <sjsamuels@gmail.com>
To   statalist@hsphsun2.harvard.edu
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 <pphillip@ich.ucl.ac.uk> 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
sjsamuels@gmail.com
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