hello!

this might sound like a silly question, but I was wondering if one might be able to fit a hybrid model (xthybrid) also when dealing with a pooled crossection. Specifically I have individuals within countries over three year waves (individuals are not the same).
I can run a FE model using dummies for countries and years, but would like to do a bit more.

I tried using
Code:
 xtset country year
which leads nowhere.