In the 1970s, after years of economic downturn, Boston boomed again. Financial institutions were granted more latitude, more people began to play the market, and Boston became a leader in the mutual fund industry. Health care became more extensive and expensive, and hospitals such as Massachusetts General Hospital, Beth Israel Deaconess Medical Center, and Brigham and Women's Hospital led the nation in medical innovation and patient care. Higher education also became more expensive, and universities such as Harvard, MIT, Boston College, BU and Tufts attracted hordes of students to the Boston area; many stayed and became permanent residents. MIT graduates, in particular, founded many successful high-tech companies, which made Boston second only to Silicon Valley as a high-tech center.