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Re: st: AW: Change in QIC output


From   "Pamela Phillips" <pphillip@ich.ucl.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: AW: Change in QIC output
Date   Tue, 25 May 2010 10:56:17 +0100 (BST)

Thanks for the suggestion. Unfortunately the discrepancy remains after
updating STATA.

Any other thoughts welcome!

Pamela



>
> <>
>
> " I am using STATA 10.0."
>
>
> We have had a couple of incidents recently on the list where non-update-d
> Stata copies were causing problems, so try an -update all- first.
>
>
>
>
> HTH
> Martin
>
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Pamela
> Phillips
> Gesendet: Dienstag, 25. Mai 2010 11:29
> An: statalist@hsphsun2.harvard.edu
> Betreff: st: Change in QIC output
>
>
> 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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