@multiverse7 Actually they blend 80/20 the six-year graduation and one year retention rates.
Then how about this “mumbo-jumbo” about their devising their own US News “predicted” graduation rate:
"Graduation rate performance (7.5 percent): This indicator of added value shows the effect of the college’s programs and policies on the graduation rate of students after controlling for spending and student characteristics, such as test scores and the proportion receiving Pell Grants. U.S. News measures the difference between a school’s six-year graduation rate for the class that entered in 2009 and the rate U.S. News had predicted for the class.
If the school’s actual graduation rate for the 2009 entering class is higher than the rate U.S. News predicted for that same class, then the college is enhancing achievement, or overperforming. If a school’s actual graduation rate is lower than the U.S. News prediction, then it is underperforming."