Maurin, Eric; McNally, Sandra - C.E.P.R. Discussion Papers - 2005
particularly important for students at an early (and highly selective) phase of higher education. They are shown to have pursued … further years of education because thresholds were lowered at critical stages (i.e. at entry to university and in the early … years of university). These historic events provide a natural experiment to analyse the returns to years of higher education …