B-SCHOOLS — MBAs for Working Stiffs

What do you call a chemist who pilots a 1999 Cessna 172R between Lincoln, Neb., and Chicago every weekend so he can someday run his own business? One very determined part-time MBA student. Mark Zieg, 34, is a drug formulator for Novartis Pharmaceuticals and a weekend student at the University of Chicago’s Graduate School of Business. Each week until March, 2003, he will fly a total of seven hours to and from classes. “It’s the only top school that’s within reach,” he says.