Father’s occupational

status^a

Son’s occupational status (%)

Lower

Same

Higher

Upper white collar (IQ of 120+)

46

54

Not applicable

Lower white collar (IQ of 110+)

37

18

45

Upper blue collar (IQ of 100+)

32

28

40

Lower blue collar (IQ of 90+)

9

36

56

Size-unweighted simple average

31%

34%

35%