The tough economy and tight labor market have tarnished the luster of a bachelor's degree for young college graduates seeking employment. New monthly survey data from the Center for Labor Market Studies at Northeastern University in Boston finds that during the first four months of 2009, 49.9 percent of the nation's 4 million college graduates age 25 and under were working in jobs that required a college degree. That's down from 54 percent for same period last year. "I've never seen it this low and we've been analyzing this stuff for over 20 years," said center director Andrew Sum.