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Re: st: Re-using multiple imputation data


From   Mosi Ifatunji <ifatunji@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re-using multiple imputation data
Date   Sat, 7 May 2011 17:00:12 -0400

Daniel,

Problem solved.

Thanks! :-)

Mosi


On May 7, 2011, at 2:17 PM, daniel klein wrote:

"[...] to generate 20 datasets in the wide format"

First of all, there is a difference between -wide- (as used in -xt-,
-reshape- or the like context) and -mi wide- (see -help mi set-, help
mi style-, -help mi convert-).

Second, if you have more than one dataset after imputing missing
values your dateset  is not in -wide- format, but -flongsep- format.
That's fine, but if you want -mi wide- format (that is: one dataset)
-mi set- your data -wide-. You may switch between mi formarts easily
with -mi convert-.

However, no matter what -mi style- your data is, there is no need for
a special command to load it. -use- will do the job, thanks to
characteristics (for more start here: -help char-) saved along with
the dataset.

Try the following example

(change to a new directory so it is easy to delete the hole thing
after the example)

/*---example---*/
. clear all
. sysuse auto.dta
. mi set flongsep some_name
. mi register imputed rep78
. mi impute reg rep78 price mpg weight ,add(5)
. save some_name.dta ,replace
. dir
. clear all
. use some_name.dta
. mi est : reg price mpg weight rep78
/*---end---*/

Best
Daniel
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