I think the shift towards more juniors moving off happened while I was there, 00-04. Probably went from 20% to 40%.
You really don't need some study here. Nice things about off campus:
- Girlfriend can stay the night.
- Free to have a party, liquor etc.
- Can smoke weed etc.
- Much more privacy.
- No RA/rector crap.
- Can park right by your house/apartment vs. dealing with gate guy to get on campus.
- Better options to cook etc.