How to run a regression excluding certain countries ids

[Saleh sharmah]

Dear all
I am trying to run a regression excluding certain countries that don’t require disclosure.
I have used this code:
reg xy if country’s Id != 39, 34,32,37 but it does not work.

thanks in advance for your help.

[Jared Greathouse]

reg y x if !inlist(Id,39, 34,32,37)