The cps1 (15992 rows) and psid1 (2490 rows)
datasets are from
non-experimental "control" groups, used in various studies of
the effect of a labor training program, alternative to the
experimental control group in nswdemo.
The cps2 (2369 rows) and cps3 (429 rows) subsets
of cps1 are designed to
be better matched to the experimental data than cps1.
Likewise, psid2 (253 rows) and psid3 (128 rows)
are subsets of psid1 that are
designed to be better matched to the experimental data than
psid1.
The nswpsid1 dataset (2675 rows) combines the experimental
treatment group in nswdemo with the psid1
control data from the Panel Study of Income Dynamics
(PSID) study.
data(psid1)
data(nswpsid1)Columns are:
a numeric vector identifying the study in which the subjects were enrolled (0 = Control, 1 = treated).
age (in years).
years of education.
(0 = not black, 1 = black).
(0 = not hispanic, 1 = hispanic).
(0 = not married, 1 = married).
(0 = completed high school, 1 = dropout).
real earnings in 1974.
real earnings in 1975.
real earnings in 1978.
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. nswpsid1 combines data for the experimental
treatment group in nswdemo with the psid1 control data
from the Panel Study of Income Dynamics (PSID) study.
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. "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.