Dartmouth, a liberal arts institution, offers a four-year Bachelor of Arts and ABET-accredited Bachelor of Engineering degree to undergraduate students. The college has 39 academic departments offering 56 major programs, while students are free to design special majors or engage in dual majors. For the graduating class of 2017, the most popular majors were economics, government, computer science, engineering sciences, and history. The Government Department, whose prominent professors include Stephen Brooks, Richard Ned Lebow, and William Wohlforth, was ranked the top solely undergraduate political science program in the world by researchers at the London School of Economics in 2003. The Economics Department, whose prominent professors include David Blanchflower and Andrew Samwick, also holds the distinction as the top-ranked bachelor's-only economics program in the world.