Changes in Pell Grant eligibility rules likely contributed to enrollment declines last year at two-thirds of the community colleges in Alabama, Arkansas and Mississippi, according to new research from the University of Alabama's Education Policy Center. The three Southern states all enroll large numbers of students who hail from rural and low-income areas, but also lack large, state-based financial aid programs. That makes students in the region particularly sensitive to last year's tightening of Pell eligibility by the U.S. Congress, according to the report.