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Re: st: Multiple imputation is increasing the sample size
From
[email protected] (Wesley D. Eddings, StataCorp)
To
[email protected]
Subject
Re: st: Multiple imputation is increasing the sample size
Date
Fri, 30 Jul 2010 16:13:00 -0500
Hassan Chawdhury <[email protected]> noticed that -mi impute mvn- added
observations to his data:
> But a weird thing happened with the mi procedure. When I run any tabulate or
> summarize command after the imputation, I can see that it has added cases to
> my sample size.
What Hassan has noticed is the intended behavior of -mi impute-. When we use
either the mlong -mi- style or the flong style, -mi impute- will store the
imputations in memory as new observations. (Hassan may use the -mi describe-
command to display his -mi- style.)
The -mi estimate- command does not support -tabulate- or -summarize-, but it
does support -proportion-, -mean-, and -ratio-. Hassan may also use -mi xeq- to
execute a command on an individual imputation.
-- Wes
[email protected]
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