crs (version 0.15-38)

cps71: Canadian High School Graduate Earnings

Description

Canadian cross-section wage data consisting of a random sample taken from the 1971 Canadian Census Public Use Tapes for male individuals having common education (grade 13). There are 205 observations in total.

Usage

data("cps71")

Format

A data frame with 2 columns, and 205 rows.

logwage

the first column, of type numeric

age

the second column, of type integer

References

Pagan, A. and A. Ullah (1999), Nonparametric Econometrics, Cambridge University Press.

Examples

## Example - we compare the nonparametric local linear kernel regression
## method with the regression spline for the cps71 data. Note that there
## are no categorical predictors in this dataset so we are merely
## comparing and contrasting the two nonparametric estimates.

data(cps71)
attach(cps71)
require(np)

model.crs <- crs(logwage~age,complexity="degree-knots")
model.np <- npreg(logwage~age,regtype="ll")

plot(age,logwage,cex=0.25,col="grey",
     sub=paste("crs-CV = ", formatC(model.crs$cv.score,format="f",digits=3),
       ", npreg-CV = ", formatC(model.np$bws$fval,format="f",digits=3),sep=""))
lines(age,fitted(model.crs),lty=1,col=1)
lines(age,fitted(model.np),lty=2,col=2)

crs.txt <- paste("crs (R-squared = ",formatC(model.crs$r.squared,format="f",digits=3),")",sep="")
np.txt <- paste("ll-npreg (R-squared = ",formatC(model.np$R2,format="f",digits=3),")",sep="")

legend(22.5,15,c(crs.txt,np.txt),lty=c(1,2),col=c(1,2),bty="n")

summary(model.crs)
summary(model.np)
detach("package:np")