WEST PALM BEACH (AP).- William Polk Carey, an entrepreneur who founded a New York-based investment management firm bearing his name and donated millions of dollars to help found business schools at universities in Maryland and Arizona, has died at 81, his firm said Monday. The board of that firm, W.P. Carey & Co., issued a statement that the Baltimore native and corporate finance pioneer died Monday at a West Palm Beach, Fla., hospital, surrounded by family and friends. Carey gave $30 million in April to the University of Maryland law school, reports noted. He also made a $50 million bequest in 2006 to Johns Hopkins University to found the Carey School of Business at that Maryland university. And in 2003, the business leader and philanthropist also gave $50 million to Arizona State