I dont know. I have heard it does make a difference. When I was in university I was told having a Punjab domicile is a disadvantage because you are competing with so many people whereas domicile like KPK is valuable because there aren't many candidates and sometimes you have reserved seats.

Its not in my control. I have a Punjab domicile and I have to live with that so I am not interested in finding out what effect it has. I am sure some domiciles get advantage during allocation but I really don't care.