Kenneth Koelln, 78, of Tulsa, Oklahoma, an economics professor from 1992 to 2007, died May 17. He served in the U.S. Marine Corps for 20 years and received a Purple Heart from his two tours in the Vietnam War. His research interests included healthcare spending by the elderly, healthcare access and alternative financing options for healthcare. He earned his bachelor’s degree from the Clarkson College of Technology, a master’s degree from Virginia Polytechnic Institute and State University, an M.B.A. from San Diego State University and his doctorate from the University of Florida. He loved the Texas Rangers, Florida Gators and chocolate.