"The growing role of class in academic success has taken experts by surprise since it follows decades of equal opportunity efforts and counters racial trends, where differences have narrowed. It adds to fears over recent evidence suggesting that low-income Americans have lower chances of upward mobility than counterparts in Canada and Western Europe."
http://www.nytimes.com/2012/12/23/e...as-class-plays-a-greater-role-in-success.html
http://www.nytimes.com/2012/12/23/e...as-class-plays-a-greater-role-in-success.html
