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st: incomplete mi set


From   Laura Gibbons <gibbonsl@u.washington.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: incomplete mi set
Date   Fri, 10 Dec 2010 16:20:15 -0800 (PST)

I am having what to me is a strange problem with mi set, which I have replicated below:

sysuse auto, clear
* just so I don't mess with the original auto data below:
tempfile temp
save `temp'
* this one works:
mi set mlong
mi register imputed rep78
mi impute mvn rep78=price mpg, add(20) rseed(29390)
keep if _mi_miss==.
collapse (mean) rep78, by(make)
tempfile temp2
save `temp2'
use `temp', clear
merge 1:1 make using `temp2', update replace
* this one gives no error message, but the _mi variables are not created:
mi set mlong

If, just to test, I try:
mi set wide

I'm informed the data are already mi set mlong.

(why I would want to do this is unclear in this example, but in my data I have a reason)

my Stata 11.1 64-bit for Windows is up to date.

Thank you!

Laura

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Laura E. Gibbons, PhD
General Internal Medicine, University of Washington
Box 359780, Harborview Medical Center, 325 Ninth Ave, Seattle, WA 98104
phone: 206-744-1842, fax: 206-744-9917,
Office address: 401 Broadway, Suite 5076-V125
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