Verizon Uses Advanced Analytics to Rationalize Its Tail Spend Suppliers. - Hossein Abdollahnejadbarough; Kalyan S. Mupparaju; Sagar Shah; Colin P. Golding; Abelardo C. Leites; Timothy D. Popp; Eric Shroyer; Yanai S. Golany; Anne G. Robinson; Vedat Akgün (INFORMS J. Appl. Anal., 2020)