Wooldridge Source: J. Grogger (1991), “Certainty vs. Severity of Punishment,” Economic Inquiry 29, 297-309. Professor Grogger kindly provided a subset of the data he used in his article. Data loads lazily.
data('crime1')
A data.frame with 2725 observations on 16 variables:
narr86: # times arrested, 1986
nfarr86: # felony arrests, 1986
nparr86: # property crme arr., 1986
pcnv: proportion of prior convictions
avgsen: avg sentence length, mos.
tottime: time in prison since 18 (mos.)
ptime86: mos. in prison during 1986
qemp86: # quarters employed, 1986
inc86: legal income, 1986, $100s
durat: recent unemp duration
black: =1 if black
hispan: =1 if Hispanic
born60: =1 if born in 1960
pcnvsq: pcnv^2
pt86sq: ptime86^2
inc86sq: inc86^2
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pages 82-83, 173-174, 180, 252-253, 275, 299, 305-306, 607-608, 625
#> 'data.frame': 2725 obs. of 16 variables: #> $ narr86 : int 0 2 1 2 1 0 2 5 0 0 ... #> $ nfarr86: int 0 2 1 2 1 0 2 3 0 0 ... #> $ nparr86: int 0 0 0 1 0 0 1 5 0 0 ... #> $ pcnv : num 0.38 0.44 0.33 0.25 0 ... #> $ avgsen : num 17.6 0 22.8 0 0 ... #> $ tottime: num 35.2 0 22.8 0 0 ... #> $ ptime86: int 12 0 0 5 0 0 0 0 9 0 ... #> $ qemp86 : num 0 1 0 2 2 4 0 0 0 3 ... #> $ inc86 : num 0 0.8 0 8.8 8.1 ... #> $ durat : num 0 0 11 0 1 ... #> $ black : int 0 0 1 0 0 0 1 0 1 0 ... #> $ hispan : int 0 1 0 1 0 0 0 0 0 1 ... #> $ born60 : int 1 0 1 1 0 1 1 1 1 1 ... #> $ pcnvsq : num 0.1444 0.1936 0.1089 0.0625 0 ... #> $ pt86sq : int 144 0 0 25 0 0 0 0 81 0 ... #> $ inc86sq: num 0 0.64 0 77.44 65.61 ... #> - attr(*, "time.stamp")= chr "25 Jun 2011 23:03"