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st: merge: replace values with missings


From   "Kaulisch, Marc" <kaulisch@forschungsinfo.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: merge: replace values with missings
Date   Fri, 23 Mar 2012 08:48:32 +0100

Dear Statalisters,

If I understand correctly then the options update and replace in merge
do not overwrite values in master-dataset with missings in
using-dataset. http://www.stata.com/help.cgi?merge
Does someone know a work-around to overwrite values in master with
missings from using when merging two datasets?
I know that alternatively I can do this by hand afterwards, but it would
be nicer if I could force merge to do so...because with over 100.000
observations it might no be that every case is detected...


Marc


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