Description Usage Format Value References
The data set combines a subsample of the experimental treated units from NSW, constructed by Dehejia and Wahba (1999), with "CPS1," a nonexperimental comparison group from CPS, constructed by LaLonde (1986).
1 
An object of class data.frame
with 16177 rows and 11 columns.
A data frame with 11 variables:

1 if treated, 0 otherwise 

age 

age squared 

years of schooling 

1 if black, 0 otherwise 

1 if Hispanic, 0 otherwise 

1 if married, 0 otherwise 

1 if high school dropout, 0 otherwise 

real earnings in 1974 

real earnings in 1975 

real earnings in 1978 
Dehejia, R. H. and Wahba, S. (1999). "Causal Effects in Nonexperimental Studies: Reevaluating the Evaluation of Training Programs," Journal of the American Statistical Association, 94:1053–1062.
LaLonde, R. J. (1986). "Evaluating the Econometric Evaluations of Training Programs with Experimental Data," American Economic Review, 76:604–620.
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