Longitudinal studies Employment 8 Attitudes 6 Education 6 Labor supply 5 Men 4 Research 3 Socially handicapped children 3 Youth 3 Child psychology 2 Children 2 College graduates 2 Congresses 2 Etiology 2 Families 2 Foster home care 2 High school graduates 2 Mental disorders 2 Mortality 2 Nurses 2 Professional socialization 2 Psychiatry 2 Students 2 Study and teaching 2 Women 2 Working class 2 Admission 1 Adolescent psychology 1 Adopted children 1 Adulthood 1