Wooldridge Source: See SLEEP75.RAW Data loads lazily.
data('slp75_81')A data.frame with 239 observations on 20 variables:
age75: age in 1975
educ75: years educ in '75
educ81: years educ in '81
gdhlth75: = 1 if good hlth in '75
gdhlth81: =1 if good hlth in '81
male: =1 if male
marr75: = 1 if married in '75
marr81: =1 if married in '81
slpnap75: mins slp wk, inc naps, '75
slpnap81: mins slp wk, inc naps, '81
totwrk75: minutes worked per week, '75
totwrk81: minutes worked per week, '81
yngkid75: = 1 if child < 3, '75
yngkid81: =1 if child < 3, '81
ceduc: change in educ
cgdhlth: change in gdhlth
cmarr: change in marr
cslpnap: change in slpnap
ctotwrk: change in totwrk
cyngkid: change in yngkid
https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041
pages 463-464
str(slp75_81)
#> 'data.frame': 239 obs. of 20 variables:
#> $ age75 : int 46 39 55 39 54 32 30 27 33 51 ...
#> $ educ75 : int 16 16 15 16 17 16 16 16 17 14 ...
#> $ educ81 : int 16 16 15 16 17 16 16 16 19 14 ...
#> $ gdhlth75: int 1 1 1 1 1 1 1 0 1 1 ...
#> $ gdhlth81: int 1 1 0 1 1 1 1 1 1 1 ...
#> $ male : int 1 1 1 1 1 1 1 1 0 0 ...
#> $ marr75 : int 0 1 1 1 1 1 1 0 1 1 ...
#> $ marr81 : int 1 0 1 1 1 1 1 0 1 1 ...
#> $ slpnap75: int 3991 2243 3285 3158 3743 3680 3778 3390 3298 3601 ...
#> $ slpnap81: int 4695 2195 3115 3387 3800 3320 3067 3910 3172 3634 ...
#> $ totwrk75: int 2050 2713 2493 2778 3118 2348 1571 3421 1853 0 ...
#> $ totwrk81: int 2430 2610 0 1787 552 2567 2272 400 2617 1312 ...
#> $ yngkid75: int 0 0 0 0 0 1 1 0 1 0 ...
#> $ yngkid81: int 0 0 0 0 0 0 0 0 0 0 ...
#> $ ceduc : int 0 0 0 0 0 0 0 0 2 0 ...
#> $ cgdhlth : int 0 0 -1 0 0 0 0 1 0 0 ...
#> $ cmarr : int 1 -1 0 0 0 0 0 0 0 0 ...
#> $ cslpnap : int 704 -48 -170 229 57 -360 -711 520 -126 33 ...
#> $ ctotwrk : int 380 -103 -2493 -991 -2566 219 701 -3021 764 1312 ...
#> $ cyngkid : int 0 0 0 0 0 -1 -1 0 -1 0 ...
#> - attr(*, "time.stamp")= chr "25 Jun 2011 23:03"