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Re: st: two step procedure


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: two step procedure
Date   Sun, 16 Sep 2007 17:04:25 +0100 (BST)

--- "Xu, Xin" <xxu11@uic.edu> wrote:
> Does anybody know how to calculate Murphy-Topel variance estimator? I
> am aware of Hardin(2002) paper and Hole et al. (2006) paper. However,
> in my case, I have two steps coming from two different data sets
> which I append them together. Therefore, it is hard for me to
> calculate C and R matrix as shown in their paper.

You should give full references, even if articles appear in the Stata
Journal. 

The only command I know of that explicitly deals with combining
estimates from multiple samples is the -suest- command. However, quite
offten people think they have multiple samples when they don't, e.g.
they think that men and women are different samples while almost
everything can be solved when adding a dummie for female and the
appropriate interaction terms.  

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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