@michaelcollege: USN provides selectivity ranks for its overall top 50 National Liberal Arts Colleges in its print edition. As a basis, it appears to use its “student excellence” formula, which considers the standardized scoring and high school class standing profiles for attending students. In context, USN’s information appears consistent. Trinity, for example, enrolls 46% of its students from the top 10% of their high school classes (to the extent that data are available for this measure), a figure substantially lower than that for colleges with which it is often associated.