Chronicle of Higher Education: It’s taken for granted that workers who hold bachelor’s degrees earn more than workers who don’t. But does it matter what subject a worker’s degree is in? Yes, according to a new study by the US Census Bureau. As the Chronicle‘s Beckie Supiano reports, the bureau correlated earnings data in 2010 with 171 different college majors. The graduates with the highest median income, $120 000 a year, had degrees in petroleum engineering. At the opposite end of the rankings were counseling psychology graduates, whose median annual income was $29 000. Physical sciences majors lay between the two extremes at $69 000.