While many business schools are struggling with decreased interest in M.B.A. programs, those business schools that are at the top of the prestige lists are spending much more to attract top students, Fortune  reported. Among "top 20" programs, at least four business schools -- those of Harvard, Northwestern and Yale Universities and the University of California at Los Angeles -- have increased average scholarship values by more than 100 percent since 2004-5, the magazine reported. "It is an arms race," said Alison Davis-Blake, dean of the University of Michigan's Ross School of Business. "The race has gotten so hot, so fast that schools are using operating money to pay for a lot of these scholarships. No one had ever, ever done that in M.B.A. land. Almost everybody is doing it now."