The variable –sex– is string, but it should be encoded to numeric.
The variables –education– and –married– are numeric but do not have value
labels, yet. Label the values of the two variables according to those given below
in the Appendix.
The variable –education– has too many categories; recode the variable, so that
it has fewer, meaningful categories. Also, the variable –income– has missings,
they should be recoded to 0.
How does wage income vary by age, sex, and education
–married–:
1 - married
2 - not married
–education–: 1 - tertiary
2 - unfinished tertiary
3 - special secondary
4 - secondary
5 - 7 years of schooling 6 - primary
7 - can read and write 8 - can read
9 - illiterate
10 - child aged 0-8 99 - missing value
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