Last year UM announced a plan to help high achieving, low income students gain more access to enrollment and hopefully matriculation by mailing a packet of information encouraging enrollment and highlighting an expanded tuition free-plan for low income students. By and large, this was not that big of a change from previous offerings as 90% of the students who would receive free tuition under HAIL would have received the same before; however, the explicit nature of HAIL made a real difference.
The Atlantic has a nice story about a new study of the positive effects. Enrollment doubled among low income candidates, and there was even a measurable effect for students who would not have applied anywhere without the nudge.
Follow up work will measure the effects on of chosen major, graduation rates, and lifetime earnings in the long term.