Hello everyone,

I have two dummy variables ger1 and ger2.

Essentially what I need to do is to create another binary variable (named here dummy) in which, for every "group" of observations in which ger1=1, if it has at least one observation where ger2=1, then dummy=1 for the entire group.

Sorry if this is confusing, I include a data sample hoping it helps clarify this a bit.
("dummy" in this case, was done by hand, it is what I want it to look like - and what I need your help with to learn how to code it).

Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input float(ger1 ger2 dummy)
0 0 0
0 0 0
1 0 0
1 0 0
1 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
1 0 1
1 0 1
1 0 1
1 0 1
1 1 1
1 1 1
0 0 0
0 0 0
1 0 0
1 0 0
0 0 0
end
I'm using Stata 14.1 on Mac.
If anyone has any insight on how to do this, it would be much appreciated.

Thanks in advance,
Ana