As a private school, UM doesn't have an institutional bias the way the other Florida schools do. They do tend to take more Florida students though, and I think that is because they they have a commitment to Miami/Florida and want to take people from the community that will be likely to stay in the state for residency. They have some of the best professional connections in the state and don't want to lose a foothold because their graduates are heading back to their home states after graduation. Also if you look at their class profile, nearly 1/3 (41 of 150) of their students went to UM for undergrad, which definitely throws the numbers a bit.