Hello,
I have data with 3 variables: Company_name (uniquely defined), owner_name (not uniquely defined) and treat (binary whether company was treated or not).
I would like to extract the Owner_names for which treat observations take both values 0 and 1.
I tried duplicates list Owner_name if treat==0 & treat==1 but it is not the right command.
Can you help?
Thank you