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Re: st: missing event times in st data


From   Murray Finkelstein <murray.finkelstein@utoronto.ca>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: missing event times in st data
Date   Tue, 18 Jun 2002 12:50:16 -0400

See Stephen Jenkins
(http://www.iser.essex.ac.uk/teaching/stephenj/ec968/index.php) on discrete
time regresison.

Stas Kolenikov wrote:

> Dear Statalisters,
>
> I have an annual study where people report their status (employed /
> unemployed). It is not always asked when the transition from one state
> to another had happened. What can I do to smartly (hm...) assign
> the initiating and terminating times? A simple thing to do is to
> take the middle of the interval as the time of change. A better thing
> might be to integrate out the missingness in the style of EM algorithm.
> Can anybody provide a reference to what can be / should be / sometimes
> is done?
>
>  ---                                    Stas Kolenikov
>  --       Ph.D. student in Statistics at UNC-Chapel Hill
>  - http://www.komkon.org/~tacik/  -- Stas.Kolenikov@unc.edu
>
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--
Murray M. Finkelstein  PhD MD CCFP
Department of Family and Community Medicine
University of Toronto

e-mail: murray.finkelstein@utoronto.ca
Phone: 416-326-7879
Fax: 416-326-7761


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