Family connections help you get into college. And a new paper suggests that at highly selective colleges, they may count even more than was previously thought.

A researcher at Harvard University recently examined the impact of legacy status at 30 highly selective colleges and concluded that, all other things being equal, legacy applicants got a 23.3-percentage-point increase in their probability of admission. If the applicants' connection was a parent who attended the college as an undergraduate, a "primary legacy," the increase was 45.1-percentage points.