Military and culture have already been listed. What I couldn't find in the files was anything for increasing economy tech. I could attempt to mod it in, but I'd have to guess what it was named.
Do that, that increases it, personally i used it so many times that my demesne is 700 and i rule everything personally, i think i currently have minimum 3 stars in every research\military\economy.
-How to increase critical character traits like 'martial, learning, stewardship, learning' etc.- 1-Go to religious_events.txt 2-Press ctrl+f and search: name = "EVTOPTA39303" 3-Add the following lines under option = { name = "EVTOPTA39303" #Yes Please': change_learning = 100 change_martial = 100 change_diplomacy = 100 change_stewardship = 100 change_intrigue = 100 4-Save and enter the game 5-Open console and type event 39303. Your character will get 100 points for each of this traits.