New numbers released last week from the National Student Clearinghouse Research Center found that undergraduate enrollment in the U.S. is down 4 percent this year, compared to last year and enrollment of students starting their college careers is down 16 percent. And that, mind you, is based on the beginning of the term. Robert Kelchen, a professor at Seton Hall University who studies higher education, says it’s too early to tell whether students who have started this semester are able to finish it. “And that’s something that could end up being a real concern,” he says.