A number of states have tried to balance their budgets (ravaged by tax cuts, among other factors) by reducing funding to their public college and university systems — raising tuitions, reducing in-state advantages, etc. These public, state-run schools were generally intended for local state residents to attend, but rising costs for locals means seeking out schools to attend in other states — and the still-higher tuition costs paid by out-of-state students in turn force cash-strapped public schools to reserve more spaces for out-of-state attendees.
[h/t +Stan Pedzick]
How Cuts to Public Universities Have Driven Students Out of State
Declines in state support for public universities have helped reshape the geography of college admissions, leading many students to attend public universities in other states, where they pay higher, out-of-state tuition.