I21, I24, J16
P, Z13, J16
C90 (Design of experiment – general), J16 (Economics of Gender), J21 (Labor Force and Employment
I12, I18, J16, O15
I25, I28, J24, L26, O15
I23; I26; C93
I24, J16, J24
I21 - Analysis of Education; J24 - Human Capital; Skills; Occupational Choice; Labor Productivity
I21, I23, O33
J24, M53, J48