Among The Economist’s top 25 MBA programs, which business schools have the best curriculum, faculty, culture, career center and facilities? And which have the worst? To rank the world’s best business schools, The Economist collects a wealth of data to help answer those questions, including the satisfaction levels of students and recent graduates who are asked to grade their schools on various dimensions. The Economist says a total of 18,712 students and graduates participated in the spring of 2012. U.Va.'s Darden School of Business ranked highly.