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st: RE: Simultaneous occurance

From   "Martin Weiss" <>
To   <>
Subject   st: RE: Simultaneous occurance
Date   Tue, 18 Mar 2008 17:28:29 +0100

Try this:

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

Fon: 0049-7071-2978184




-----Original Message-----
[] On Behalf Of Olga Lyashevskaya
Sent: Tuesday, March 18, 2008 4:56 PM
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,


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