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st: reporting results from a multiple imputed data set


From   "Lamla, Bettina" <Bettina.Lamla@rwi-essen.de>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: reporting results from a multiple imputed data set
Date   Wed, 20 Apr 2011 15:24:25 +0200

Hi everyone,

I need a recommendation.

I have a multiple imputed data set (N imputations) and with a set of dummy variables (M years).  Let’s take year dummies as an example. Stata omits of the M year dummies due to collinearity.
 As it turns out it is not always the same year dummy in the N regressions.  In conclusion, when I apply the Rubin Rule I get an estimate for all N year dummies.

Which way is the correct one: Shall I just exclude one dummy prior to running the regressions or do I report (after application of the Rubin Rule) coefficients for all M dummies?

I hope I made myself clear.
Thanks!

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