Hi Maarten,
I have concluded that it is my copying and pasting mechanism (paste
and match style does not work) that I am having difficulties with when
I try to reply. So I will need to retype what I did with your below
response. First, I opened the data file in which I saved the stacked
imputed data sets: m(5), each set n = 3,300. Next, I ran the below
syntax (for my below example, I only included a few predictor
variables and the criterion variable pforce). I obtained coefficients
for the run. Did I do this correctly? Please remember that I am a
Stata beginner. Thank you.
Best Frank
----------------------------------------------------------
mim, storebv: regress pforce assign time day
foreach var of varlist pforce assign time day {
gen double z`var' =.
}
forvalues i = 1/5 {
foreach var of varlist pforce assign time day {
sum `var' if _mj ==`i'
replace z `var' = (`var' - r(mean)) / r(sd) if _mj == `i'
}
}
mim: regress zpforce zassign ztime zday
-------------------------------------------------------------
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, [email protected] <[email protected]> wrote:
From: [email protected] <[email protected]>
Subject: Re: st: Re: Calculate beta values for mim results
To: [email protected]
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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