12, I15, I18, I25, O12, C93
K14, K42, O15, O10
C93 (field experiment), J24 (Human Capital • Skills • Occupational Choice • Labor Productivity
O12, O15, J15, I38
A23, C93, J24, O31, L86, I31
26, J24, D83, D84
I24, I26, J24, G53
I21, I28, C93, O33
I26, J38, J24, J23
I21, I25, J13, J24, O15, C93