Hello everyone,

I'm new to STATA and i have the following problem:
I want to drop all observations, that don't contain the words "Mergers" or "Acquisition" for the Variable (String) "Dealtype".

I used the following Drop if Strmatch formula:

drop if strmatch(Dealtype, "*Merger*")==0

worked just fine but then STATA deletes everything, that isn't named Merger. How can i add the Condition to delete all Observations, if the Variable "Dealtype" doesn't contain the words "Merger" OR "Acquisition"?

Hope you can help me out.