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Re: st: RE: Re: Missing values test


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: Re: Missing values test
Date   Tue, 4 Dec 2007 05:39:13 +0000 (GMT)

--- "Rodrigo A. Alfaro" <raalfaroa@gmail.com> wrote:
> Paul himself wrote a macro for SAS available in his webpage 
> (http://www.ssc.upenn.edu/~allison/) that uses the EM/IP algorithm
> based on multivariate normal to generate multiple imputations. I do
> not have SAS, but I understand that the macro works using SAS/IML
> language which I realized is  very similar to Mata in the case of
> Stata.
> 
> Now the questions: (1) Is there someone who traslated that SAS/IML
> code into Mata?, (2) Is there someone who is planning to do it? I am
> interested to contact that person because I need the code and I want
> to try the traslation.

That looks a lot like a program by Joe Schafer called norm. An version
of that program also exists in R. The inner workings are described in
detail in: 
Schafer, J.L. (1997) "Analysis of Incomplete Multivariate Data",
Chapman & Hall, London.

-- 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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