Wooldridge Source: L.A. Whittington, J. Alm, and H.E. Peters (1990), “Fertility and the Personal Exemption: Implicit Pronatalist Policy in the United States,” American Economic Review 80, 545-556. The data are given in the article. Data loads lazily.
data('fertil3')
A data.frame with 72 observations on 24 variables:
gfr: births per 1000 women 15-44
pe: real value pers. exemption, $
year: 1913 to 1984
t: time trend, t=1,...,72
tsq: t^2
pe_1: pe[_n-1]
pe_2: pe[_n-2]
pe_3: pe[_n-3]
pe_4: pe[_n-4]
pill: =1 if year >= 1963
ww2: =1, 1941 to 1945
tcu: t^3
cgfr: change in gfr: gfr - gfr_1
cpe: pe - pe_1
cpe_1: cpe[_n-1]
cpe_2: cpe[_n-2]
cpe_3: cpe[_n-3]
cpe_4: cpe[_n-4]
gfr_1: gfr[_n-1]
cgfr_1: cgfr[_n-1]
cgfr_2: cgfr[_n-2]
cgfr_3: cgfr[_n-3]
cgfr_4: cgfr[_n-4]
gfr_2: gfr[_n-2]
https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041
pages 358, 377, 378, 397-398, 401, 408, 441, 649, 664-665, 673
#> 'data.frame': 72 obs. of 24 variables: #> $ gfr : num 125 127 125 123 121 ... #> $ pe : num 0 0 0 0 19.3 ... #> $ year : int 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 ... #> $ t : int 1 2 3 4 5 6 7 8 9 10 ... #> $ tsq : int 1 4 9 16 25 36 49 64 81 100 ... #> $ pe_1 : num NA 0 0 0 0 ... #> $ pe_2 : num NA NA 0 0 0 ... #> $ pe_3 : num NA NA NA 0 0 ... #> $ pe_4 : num NA NA NA NA 0 ... #> $ pill : int 0 0 0 0 0 0 0 0 0 0 ... #> $ ww2 : int 0 0 0 0 0 0 0 0 0 0 ... #> $ tcu : num 1 8 27 64 125 216 343 512 729 1000 ... #> $ cgfr : num NA 1.9 -1.6 -1.6 -2.4 ... #> $ cpe : num NA 0 0 0 19.3 ... #> $ cpe_1 : num NA NA 0 0 0 ... #> $ cpe_2 : num NA NA NA 0 0 ... #> $ cpe_3 : num NA NA NA NA 0 ... #> $ cpe_4 : num NA NA NA NA NA ... #> $ gfr_1 : num NA 125 127 125 123 ... #> $ cgfr_1: num NA NA 1.9 -1.6 -1.6 ... #> $ cgfr_2: num NA NA NA 1.9 -1.6 ... #> $ cgfr_3: num NA NA NA NA 1.9 ... #> $ cgfr_4: num NA NA NA NA NA ... #> $ gfr_2 : num NA NA 125 127 125 ... #> - attr(*, "time.stamp")= chr "25 Jun 2011 23:03"