Wooldridge Source: J. Mullahy (1997), “Instrumental-Variable Estimation of Count Data Models: Applications to Models of Cigarette Smoking Behavior,” Review of Economics and Statistics 79, 596-593. Professor Mullahy kindly provided the data. He obtained them from the 1988 National Health Interview Survey. Data loads lazily.
data('bwght')A data.frame with 1388 observations on 14 variables:
faminc: 1988 family income, $1000s
cigtax: cig. tax in home state, 1988
cigprice: cig. price in home state, 1988
bwght: birth weight, ounces
fatheduc: father's yrs of educ
motheduc: mother's yrs of educ
parity: birth order of child
male: =1 if male child
white: =1 if white
cigs: cigs smked per day while preg
lbwght: log of bwght
bwghtlbs: birth weight, pounds
packs: packs smked per day while preg
lfaminc: log(faminc)
https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041
pages 18, 61, 110, 151, 165, 178, 184, 187-188, 258-259, 522-523
str(bwght)
#> 'data.frame': 1388 obs. of 14 variables:
#> $ faminc : num 13.5 7.5 0.5 15.5 27.5 7.5 65 27.5 27.5 37.5 ...
#> $ cigtax : num 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 ...
#> $ cigprice: num 122 122 122 122 122 ...
#> $ bwght : int 109 133 129 126 134 118 140 86 121 129 ...
#> $ fatheduc: int 12 6 NA 12 14 12 16 12 12 16 ...
#> $ motheduc: int 12 12 12 12 12 14 14 14 17 18 ...
#> $ parity : int 1 2 2 2 2 6 2 2 2 2 ...
#> $ male : int 1 1 0 1 1 1 0 0 0 0 ...
#> $ white : int 1 0 0 0 1 0 1 0 1 1 ...
#> $ cigs : int 0 0 0 0 0 0 0 0 0 0 ...
#> $ lbwght : num 4.69 4.89 4.86 4.84 4.9 ...
#> $ bwghtlbs: num 6.81 8.31 8.06 7.88 8.38 ...
#> $ packs : num 0 0 0 0 0 0 0 0 0 0 ...
#> $ lfaminc : num 2.603 2.015 -0.693 2.741 3.314 ...
#> - attr(*, "time.stamp")= chr "25 Jun 2011 23:03"