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Re: st: Re: Calculate beta values for mim results


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Re: Calculate beta values for mim results
Date   Sat, 2 May 2009 16:07:29 +0200

<>

You wanna make sure that your message is still plain-text- just before sending. Sometimes stuff inserted from other sources changes the thing, at least in my experience...

HTH
Martin
_______________________
----- Original Message ----- From: <fjgallo@mac.com>
To: <statalist@hsphsun2.harvard.edu>
Sent: Saturday, May 02, 2009 3:38 PM
Subject: Re: st: Re: Calculate beta values for mim results


Hi Maarten,

This is a test reply to see whether I can reply to your message and have it post without pasting the syntax I used from your example.

Best,
Frank


On May 1, 2009, at 12:04 PM, Maarten buis wrote:


This is one way of getting standardized coefficients after multiple imputation:

*------------------- begin example ----------------------------
sysuse auto, clear
ice rep78 price mpg, m(5) clear

foreach var of varlist rep78 price mpg {
gen double z`var' = .
}

forvalues i = 1/5 {
foreach var of varlist rep78 price mpg {
sum `var' if _mj == `i'
replace z`var' = (`var' - r(mean)) / r(sd) if _mj == `i'
}
}

mim : reg zprice zrep78 zmpg
*--------------------- end example ---------------------------------

Hope this helps,
Maarten

-----------------------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

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


--- On Fri, 1/5/09, fjgallo@mac.com <fjgallo@mac.com> wrote:

From: fjgallo@mac.com <fjgallo@mac.com>
Subject: Re: st: Re: Calculate beta values for mim results
To: statalist@hsphsun2.harvard.edu
Date: Friday, 1 May, 2009, 4:16 PM
Thank you. Your thoughts were helpful, and I also hope that
an experienced person with the -mim- command might offer
some insight.

Best,
Frank

On May 1, 2009, at 11:01 AM, Martin Weiss wrote:

<>

You can find a general recipe for recovering the beta
coefficients here:
http://www.stata.com/statalist/archive/2009-03/msg00154.html

As I have never used -mim-,  I am highly reluctant to
endorse any calculation in connection with it. AFAIK, P.
Royston, its author, does not post to the list regularly, so
he is unlikely to comment, either. But there are probably
more experienced listers who can step in...

Note that my  -mata- code was way too complicated as you
have now revealed that you are a beginner. Sorry about
that...

HTH
Martin
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