At the University of Arizona, school officials know when students are going to drop out before they do. The public college in Tucson has been quietly collecting data on its first-year students' ID card swipes around campus for the last few years. The ID cards are given to every enrolled student and can be used at...

At the University of Arizona, school officials know when students are going to drop out before they do. The public college in Tucson has been quietly collecting data on its first-year students' ID card swipes around campus for the last few years. The ID cards are given to every enrolled student and can be used at...