How can I compare two ID's variables in order to check if they exist both on two different datasets?

[Michael Duarte Goncalves]

Hi everyone,

I have two sets of data: "A.dta" and "B.dta".
My question is the following:

• Is there a way in stata to check if IDs from both datasets appear in each other please?

Thank you so much in advance.

Michael

[Andrew Musau]

Merge the IDs and the matches (_merge==3) are the IDs that appear on both datasets.

help merge

[Michael Duarte Goncalves]

Andrew Musau:

Perfect: Thank you for the suggestion.

Best wishes,

Michael