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Re: st: mediation analysis


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: mediation analysis
Date   Thu, 17 May 2007 16:44:00 +0100 (BST)

--- Garth Rauscher <garthr@uic.edu> wrote:
> I have been conducting mediation analyses to determine to what extent
> certain social variables can explain why Black women are diagnosed at
> a later stage of breast cancer compared to white women.
> 
> I am estimating two models...
> 
> logit latestage Black, or
> logit latestage Black mediator, or
> 
> ...then calculating the percent reduction in the odds ratio for
> "Black".
> 
> Putting aside issues of whether this is the best method to do such an
> analysis (probably not),

To be clear, the answer I just sent is by no means an official
endorsement of this method (not that many people have ever asked me for
an official endorsement, let alone need one, but you get the point).
You are right this is not the best way of doing this. The clearest
exposition I have found of issues you should consider is this course
note by Richard Williams: http://www.nd.edu/~rwilliam/xsoc73994/l06.pdf

Hope this helps,
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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