Wooldridge Source: Obtained from the United States Census Bureau by Professor Alberto Abadie of the Harvard Kennedy School of Government. Professor Abadie kindly provided the data. Data loads lazily.
data('census2000')A data.frame with 29501 observations on 6 variables:
state: State (ICPSR code)
puma: Public Use Microdata Area
educ: educational attainment
lweekinc: log(weekly income)
exper: years workforce experience
expersq: exper^2
pages 452-453
str(census2000)
#> 'data.frame': 29501 obs. of 6 variables:
#> $ state : Factor w/ 51 levels "Alabama","Alaska",..: 41 39 11 29 3 5 38 27 14 19 ...
#> $ puma : int 100 2502 1800 100 206 1601 1309 100 3301 1600 ...
#> $ educ : int 13 13 12 13 16 12 13 13 16 16 ...
#> $ lweekinc: num 6.47 6.09 7.03 6.69 7.34 ...
#> $ exper : int 37 14 21 12 18 15 29 14 22 26 ...
#> $ expersq : int 1369 196 441 144 324 225 841 196 484 676 ...