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st: RE: Simultaneous occurance


From   "Martin Weiss" <martin.weiss@uni-tuebingen.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Simultaneous occurance
Date   Tue, 18 Mar 2008 17:28:29 +0100

Try this:


******
clear*
set obs 1000
g byte var1=1 if uniform()<0.7
replace var1=0 if var1==.
g byte var2=1 if uniform()<0.5
replace var2=0 if var2==.

g byte indicator=var1==1 & var2==1 | var1==0 & var2==0

ta var1 var2 if ind==0
ta var1 var2 if ind==1
******


Martin Weiss
_________________________________________________________________

Diplom-Kaufmann Martin Weiss
Mohlstrasse 36
Room 415
72074 Tuebingen
Germany

Fon: 0049-7071-2978184

Home: http://www.wiwi.uni-tuebingen.de/cms/index.php?id=1130

Publications: http://www.wiwi.uni-tuebingen.de/cms/index.php?id=1131

SSRN: http://papers.ssrn.com/sol3/cf_dev/AbsByAuth.cfm?per_id=669945

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Olga Lyashevskaya
Sent: Tuesday, March 18, 2008 4:56 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: Simultaneous occurance

Dear all,

There are two binary variables in my sample, where 1
is presence and 0 is absence of the particular
characteristic. I want to identify those cases where I
get either both 0's or both 1's

Any suggestions?

Thank you in advance,
Olga


  


 
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