nsw74demo data frame, with 445 rows and 10 columns,
is the subset of the
nswdemo dataset for which 1974
earnings are available.
Data are for the male experimental control and treatment
groups, in an investigation of the effect of training
on changes, between 1974-1975 and 1978, in the earnings
of individuals who had experienced employment difficulties.
nsw74psid1 (2675 rows) is the subset of the
nswpsid1 data, and
nsw74psid3 (313 rows) is the subset of
nswpsid3 data, for which 1974 income is available.
NB, also, the
nsw74psidA data set.
data(nsw74demo) data(nsw74psid1) data(nsw74psid3) data(nsw74psidA)
a numeric vector identifying the study in which the subjects were enrolled (0 = PSID, 1 = NSW).
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.
nsw74psidA data set (252 rows) was obtained from
here <- age <= 40 & re74<=5000 & re75 <= 5000 & re78 < 30000
nsw74psidA <- nsw74psid1[here, ]
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.