R/nswproject.R

In camerondata: Datasets from "Microeconometrics: Methods and Applications" by Cameron and Trivedi

#' Training and earnings
#'
#' Data from the National Supported Work (NSW) demonstration project
#' used by Lalonde (1986), and Dehejia and Wahba (1999, 2002).
#' This sample has 185 observations in the treatment group and 2490 in the
#' control group. The treatment sample consists of males who received
#' training during 1976-1977. THe control group consists of male
#' household heads under the age of 55 who are not retired,
#' drawn from the PSID (Cameron and Trivedi, 2005).
#'
#'
#'
#'
#' @usage nswproject
#'
#' @format A data frame with 2675 observations and 18 variables:
#' \describe{
#'   \item{treat}{= 1 if individual is in treatment group, = 0 if in control group}
#'   \item{age}{age in years}
#'   \item{educ}{education in years}
#'   \item{black}{= 1 if black}
#'   \item{hisp}{= 1 if hispanic}
#'   \item{marr}{= 1 if married}
#'   \item{re74}{real annual earnings in 1974 (pre-treatment), in 1982 usd}
#'   \item{re75}{real annual earnings in 1975 (pre-treatment), in 1982 usd}
#'   \item{re78}{real annual earnings in 1978 (post-treatment), in 1982 usd}
#'   \item{u74}{= 1 if unemployed in 1974}
#'   \item{u75}{= 1 if unemployed in 1975}
#'   \item{agesq}{age squared}
#'   \item{educsq}{educ squared}
#'   \item{nodegree}{= 1 if years of education < 12}
#'   \item{re74sq}{re74 squared}
#'   \item{re75sq}{re75 squared}
#'   \item{u74black}{interaction term u74 x black}
#'   \item{u74hisp}{interaction term u74 x hisp}
#' }
#' @section Section in Text:
#' 25.8 Treatment Evaluation Example: The Effect of Training on Earnings, pp. 889-95
#' @source \url{http://cameron.econ.ucdavis.edu/mmabook/mmadata.html}
#' @references
#' Cameron, A. and Trivedi, P. (2005), "Microeconometrics: Methods and
#' Applications," Cambridge University Press, New York.
#'
#' Dehejia R. and Wahba S. (1999), "Causal Effects in Nonexperimental
#' Studies: Reevaluating the Evaluation of Training Programs,"
#' JASA, 1053-1062.
#'
#' Dehejia R. and Wahba S. (2002), "Propensity-score Matching Methods for
#' Nonexperimental Causal Studies", ReStat, 151-161
#'
#' Lalonde, R. (1986), "Evaluating the Econometric Evaluations of
#' Training Programs with Experimental Data," AER, 604-620.
#' @examples
#' summary(nswproject)
"nswproject"