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st: corporate integration
I have a Dataset containing corporate structures and want to find out about corporate integration, i.e. I want to mark those observations (i.e. firms) which mutually hold shares in their businesses.
The structure is as follows (toy example):
"parent firm" "subsidiary company" "amount of holding"
1234 5678 25%
1234 7788 100%
1234 8897 70%
5678 1234 30%
5678 3484 100%
6666 9099 60%
records 1 and 4 (i.e. firms number 1234 and 5678 mutually hold shares and I trying to find a way to identify them with Stata but have not found a solution yet.
Any suggestion would be much appreciated,
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