Studies have estimated that a double major experiences a benefit of approximately 2.3% to 3.4% to their earnings compared to single majors.[1][2] A major in the science, technology, engineering or mathematics, either as a single major or part of a double major, fared appreciably better than other double-major combinations. Students double majoring in engineering and natural sciences earned an average salary of $78,342; those double majoring in education and a social science earned $45,491.[3][4]