Control variables in interaction function

[Klaudia Lennerling]

Hello fellow stata users!

I have a more theoretical question instead of how to use stata. I was wondering if it is okay to add control variables in an interaction function?

best wishes,
Klaudia

[Matthew Alexander]

Hi Klaudia,
The answer to your question is yes - control variables can be component terms of an interaction.
Note, though, that your model should generally include as parameters both the control variable and the interaction term of which it is a component of.
All the best,
Matt