Hi everyone!

I am running an LSDV model with 66 countries and 10 years. For creating dummies for each country I use the command i.countryid i.year in my regression. Stata automatically drops a dummy as reference cathegory. However, I would like to pick the reference cathegory myself, without having to actually create 66 dummies and include them individually in my regression. Can someone help me, how I could code that?
Thanks in advance!