Research " THE EFFECTS OF CUSTOMER LOYALITY ON PROFITABILLITY "

THE EFFECTS OF CUSTOMER LOYALITY ON PROFITABILLITY Chapter Three turns to a wholly different, but not unrelated, topic, the role of admissions exam scores in the identification of well-prepared students in the college admissions process. The case for using such exams is often made with “validity” studies, which estimate the correlation between test scores and eventual collegiate grades, both with and without controls for high school grade point average. I argue that there are two fundamental problems with these studies as they are often carried out. First, they do not adequately account for the biases created by estimation from a selected sample of students whose collegiate grades...