labsup

Description

Wooldridge Source: The subset of data for black or Hispanic women used in J.A. Angrist and W.E. Evans (1998) Data loads lazily.

Usage

data('labsup')

Format

A data.frame with 31857 observations on 20 variables:

• kids: number of kids

• morekids: had more than 2 kids

• boys2: first two births boys

• girls2: first two births girls

• boy1st: first birth boy

• boy2nd: second birth boy

• samesex: first two kids are of same sex

• multi2nd: =1 if 2nd birth is twin

• age: age of mom

• agefstm: age of mom at first birth

• black: =1 of black

• hispan: =1 if hispanic

• worked: mom worked last year

• weeks: weeks worked mom

• hours: hours of work per week, mom

• labinc: mom's labor income, $1000s

• faminc: family income, $1000s

• nonmomi: 'non-mom' income, $1000s

• educ: mom's years of education

• agesq:

Notes

This example can promote an interesting discussion of instrument validity, and in particular, how a variable that is beyond our control – for example, whether the first two children have the same gender – can, nevertheless, affect subsequent economic choices. Students are asked to think about such issues in Computer Exercise C13 in Chapter 15. A more egregious version of this mistake would be to treat a variable such as age as a suitable instrument because it is beyond our control: clearly age has a direct effect on many economic outcomes that would play the role of the dependent variable.

Used in Text: pages 530-531

Source

http://www.cengage.com/c/introductory-econometrics-a-modern-approach-7e-wooldridge

Examples

 str(labsup)