Evaluation of the Australian Wage Subsidy Special Youth ...

170
Table 5.5 Summary statistics for attrition effects by source of sample loss
Mean and
standard deviation (s.d.)
sample
after
attrition
mean 110
(1)
s.d.
(2)
Those
lost
through
natural
attrition
mean
s.d.
Difference
in means 111
(absolute)
T –test
Those
lost
through
analytical
selection
mean
s.d.
Differenc
e in
means
(absolute)
syetp 0.08 0.27 0.05 0.22 0.03 2.91** 0.04 0.21 0.04 2.85**
Female 0.41 0.49 0.41 0.49 0 0.40 0.49 0.01 0.49
Average age 1984 19.99 2.41 20.13 2.39 0.16 1.30 19.82 2.36 0.17 1.25
Aboriginal/Torres Strait 0.03 0.17 0.04 0.19 0.01 0.82 0.04 0.20 0.01 0.92
Islander
Other ethnic minority 0.08 0.27 0.09 0.29 0.01 1.03 0.09 0.29 0.01 0.65
Married 1984 0.12 0.32 0.12 0.33 0 0.07 0.25 0.05 3.27***
Spouse employed 1984 0.06 0.24 0.05 0.21 0.01 1.02 0.02 0.14 0.04 4.12***
Children 1984 0.05 0.23 0.04 0.21 0.01 1.03 0.04 0.20 0.01 1.05
Highest qualification in 1984
Degree/diploma 0.12 0.32 0.11 0.32 0.01 0.45 0.09 0.29 0.03 1.43
Apprenticeship 0.08 0.27 0.07 0.26 0.01 0.49 0.06 0.23 0.02 1.74*
Other post-school
0.07 0.26 0.06 0.25 0.01 0.53 0.08 0.27 0.01 0.70
qualification
Year 12 of school 0.15 0.35 0.14 0.34 0.01 0.70 0.22 0.41 0.07 3.22***
Year 11 of school 0.14 0.35 0.11 0.31 0.03 1.86* 0.11 0.31 0.03 1.49
Year 10 of school 0.31 0.46 0.32 0.47 0.01 0.04 0.27 0.44 0.04 1.76*
Year 9 of school 0.12 0.33 0.18 0.38 0.06 2.98*** 0.12 0.32 0
Parental background
when resp. aged 14
Father postschool
qualification
0.34 0.47 0.34 0.47 0 0.36 0.48 0.02 0.67
Mother postschool
0.18 0.39 0.21 0.41 0.03 1.26 0.18 0.38 0
qualification
Father manager, professional, 0.26 0.44 0.24 0.43 0.02 1.01 0.24 0.43 0.02 0.57
T –test
110 The mean of a 0/1 binary variable is the same as the proportion.
111 The difference is calculated between the mean of those lost from the sample and the mean of those remaining after attrition.