At least a quarter of the gap in college participation rates between lower and middle class students and upper class students in Australia, Britain and the United States cannot be explained by academic achievement, according to new research released by the Sutton Trust,  a British think tank. The study looked at the academic preparation and enrollment patterns in different countries, with an emphasis on trying to be sure that the better success levels of wealthier students in enrolling in higher education can't be attributed only to their better preparation. And the study said that it can't be. The study was conducted by John Jerrim of the Institute of Education at the University of London.
He found that in the United States, children of professionals are 3.3 times more likely to go to leading public universities than are working class children, and that about 40 percent of the difference cannot be explained by differences in academic achievement. At top private universities, he said, the gap is even larger, and 52 percent of the difference cannot be explained by academic achievement.