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Re: st: Help with multiple imputation using Stata


From   "Jon Heron (ALSPAC)" <Jon.Heron@bristol.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Help with multiple imputation using Stata
Date   Wed, 21 Nov 2007 09:15:37 +0000

Are you using the latest copy of ice?

I believe Patrick Royston has been working on the problem
of perfect prediction - adding fake cases to the dataset to guard
against this problem. Perhaps this hasn't been implemented yet.


Jon


--On 21 November 2007 07:14 +0000 Maarten buis <maartenbuis@yahoo.co.uk> wrote:


So that was the problem -ice- ran into, and now you know something
more: the variable numnp10y2 is the offending variable. See if the
logit works when you remove that variable, and if that is the case,
rerun -ice- but remove numnp10y2 from the e10y_np equation using the
-eq()- option.

--Maarten

--- Adriana Pinho <adrianaapinho@gmail.com> wrote:

Hi Maarten,
Thanks for your advice but the following error message came out:

logit e10y_np numcp10y3 numnp10y2 elife_lp cp10y1 cp10y2 male6m1
male6m2 malever1 malever2

"outcome = numnp10y2 > 0 predicts data perfectly
r(2000)"

Would you know to what next step I should move on?

Thanks in advance for your help
Regards,
Adriana



On Nov 17, 2007 9:05 AM, Maarten buis <maartenbuis@yahoo.co.uk>
wrote:
> --- Adriana Pinho <adrianaapinho@gmail.com> wrote:
> > "Error running -uvis- I detected a problem with running uvis with
> > command logit on response e10y_np
> > and covariates numcp10y3 numnp10y2 elife_lp cp10y1 cp10y2 male6m1
> > male6m2 malever1 malever2 r(198)"
>
> Try running:
>
> logit e10y_np numcp10y3 numnp10y2 elife_lp cp10y1 cp10y2 /*
> */ male6m1 male6m2 malever1 malever2
>
> and see if that gives you any trouble
>
> -- Maarten
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
> visiting address:
> Buitenveldertselaan 3 (Metropolitan), room Z434
>
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
>
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-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


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--------------------------------------------------
Dr Jon Heron
Statistics Team Leader
ALSPAC, Dept of Social Medicine
24 Tyndall Avenue
Bristol BS8 1TQ
Tel: 0117 3311616
Fax: 0117 3311704
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