Random subsample from the data of Angrist & Evans (1991).

## Format

A data frame with 5,000 rows and 13 variables.

- worked
Indicator equal to 1 if the mother is employed.

- weeksw
Number of weeks of employment.

- hoursw
Hours worked per week.

- morekids
Indicator equal to 1 if the mother has more than 2 kids.

- samesex
Indicator equal to 1 if the first two children are of the same sex.

- age
Age in years.

- agefst
Age in years at birth of the first child.

- black
Indicator equal to 1 if the mother is black.

- hisp
Indicator equal to 1 if the mother is Hispanic.

- othrace
Indicator equal to 1 if the mother is neither black nor Hispanic.

- educ
Years of education.

- boy1st
Indicator equal to 1 if the first child is male.

- boy2nd
Indicator equal to 1 if the second child is male.