Which one is more correct: “works at a university” or “works in a university”?
It seems that only in the U.S. one says that they are or were "in college", even though the person attended a university, such as the University of Iowa. You are either in college, or majored in such and such while in college. You hear the phrase "at college" less often, but never "at university" in the U.S.
Elsewhere, even next door in Canada, the equivalent phrase seems to be "at university": "I majored in English while at university." I don't think I have ever heard or read the phrase "in university" used.
Likewise, in the U.S., one says, for example, "I will be going to college next year" whereas elsewhere one seems to say "I will be going to university next year."
Is there anywhere else in the world besides the U.S. where the phrase "in college" is used instead of "at university"? How did the American English usage come about?