8Ann L. Mullen,KimberlyA.Goyette,JosephA.Soares. Who Goesto Graduate School? Social and Academic Correlates of Educational Continuation after College [J].Sociology of Education, 2003,76(2): 143 - 169.
9Astin A W. What matters in college[J]. 1993.
10Christian Belzil, Marco Leonardi, Can risk aversion explain schooling attainments? Evidence from Italy, Labour Economics 14 (2007) pp.957-970.