The Arizona Board of Regents, the governing body of Arizona State, called Crow "a remarkable leader of the highest caliber" and said he has boosted student success and the state's economy. "Under President Crow's leadership, the four-year graduation rate for Arizona residents has nearly doubled since 2002 and research expenditures are on a strong trajectory of growth, having nearly quadrupled during the same time," board vice chair Bill Ridenour said by email. The Chronicle changed its methodology for total compensation in this year's survey to include nontaxable benefits such as medical insurance and legal services. According to the latest study of private colleges, which used data from 2014, almost 40 colleges paid their chiefs at least $1 million, led by $5.4 million at Wilmington University in Delaware.