True, but let’s do the math. Freshman and sophomores at UPenn MUST live on campus – so that represents 50% of the undergraduate student body. According to the Penn’s website 58% of undergraduates live on campus, therefore only 8% of juniors and seniors live on-campus. As such, the majority of upperclass students live off campus. And they do so because UPenn does not have the space to house all upperclass students on their campus and actively encourages juniors and seniors to move out.