The United States has the lowest college completion rate in the developed world. It's not easy to fix, but what if schools knew early which students might drop out? A new report from the New America Foundation says at least 40 percent of schools try to gauge student performance by comparing past students to current ones. It's called predictive analytics, but how well does it work? We talk with Manuela Ekowo of the New America Foundation and vice provost Tim Renick of Georgia State University.