# R Dataset / Package DAAG / cps2

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Documentation

On this Picostat.com statistics page, you will find information about the cps2 data set which pertains to Labour Training Evaluation Data. The cps2 data set is found in the DAAG R package. You can load the cps2 data set in R by issuing the following command at the console data("cps2"). This will load the data into a variable called cps2. If R says the cps2 data set is not found, you can try installing the package by issuing this command install.packages("DAAG") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the cps2 R data set. The size of this file is about 91,486 bytes.

## Labour Training Evaluation Data

### Description

A non-experimental "control" group, used in various studies of the effect of a labor training program, alternative to the experimental control group in nswdemo.

### Usage

cps1
cps2
cps3


### Format

This data frame contains the following columns:

trt

a numeric vector identifying the study in which the subjects were enrolled (0 = Control, 1 = treated).

age

age (in years).

educ

years of education.

black

(0 = not black, 1 = black).

hisp

(0 = not hispanic, 1 = hispanic).

marr

(0 = not married, 1 = married).

nodeg

(0 = completed high school, 1 = dropout).

re74

real earnings in 1974.

re75

real earnings in 1975.

re78

real earnings in 1978.

### Details

The cps1 and psid1 data sets are two non-experimental "control" groups, alternative to that in nswdemo, used in investigating whether use of such a non-experimental control group can be satisfactory. cps2 and cps3 are subsets of cps1, designed to be better matched to the experimental data than cps1. Similary psid2 and psid3 are subsets of psid1, designed to be better matched to the experimental data than psid1.

### References

Dehejia, R.H. and Wahba, S. 1999. Causal effects in non-experimental studies: re-evaluating the evaluation of training programs. Journal of the American Statistical Association 94: 1053-1062.

Lalonde, R. 1986. Evaluating the economic evaluations of training programs. American Economic Review 76: 604-620.

Smith, J. A. and Todd, P.E. 2005,"Does Matching overcome LaLonde's critique of nonexperimental estimators", Journal of Econometrics 125: 305-353.

Dehejia, R.H. 2005. Practical propensity score matching: a reply to Smith and Todd. Journal of Econometrics 125: 355-364.

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Dataset imported from https://www.r-project.org.

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