#' The data relate to the construction of 32 light water reactor (LWR)
#' plants constructed in the U.S.A in the late 1960's and early
#' 1970's. The data was collected with the aim of predicting the cost
#' of construction of further LWR plants. 6 of the power plants had
#' partial turnkey guarantees and it is possible that, for these
#' plants, some manufacturers' subsidies may be hidden in the quoted
#' capital costs.
#'
#' @source The data were obtained from the \code{boot} package, for
#' which they were in turn taken from Cox and Snell (1981). Although
#' the data themselves are the same as those in the \code{nuclear}
#' data frame in the \code{boot} package, the row names of the data
#' frame have been changed. (The new row names were selected to
#' ease certain demonstrations in \code{optmatch}.)
#'
#' This documentation page is also adapted from the \code{boot}
#' package, written by Angelo Canty and ported to R by Brian Ripley.
#'
#' @title Nuclear Power Station Construction Data
#' @format A data frame with 32 rows and 11 columns
#' \itemize{
#' \item cost: The capital cost of construction in millions of
#' dollars adjusted to 1976 base.
#' \item date: The date on which the construction permit was issued.
#' The data are measured in years since January 1 1990 to the
#' nearest month.
#' \item t1: The time between application for and issue of the
#' construction permit.
#' \item t2: The time between issue of operating license and
#' construction permit.
#' \item cap: The net capacity of the power plant (MWe).
#' \item pr: A binary variable where \code{1} indicates the prior
#' existence of a LWR plant at the same site.
#' \item ne: A binary variable where \code{1} indicates that the
#' plant was constructed in the north-east region of the U.S.A.
#' \item ct: A binary variable where \code{1} indicates the use of a
#' cooling tower in the plant.
#' \item bw: A binary variable where \code{1} indicates that the
#' nuclear steam supply system was manufactured by Babcock-Wilcox.
#' \item cum.n: The cumulative number of power plants constructed by
#' each architect-engineer.
#' \item pt: A binary variable where \code{1} indicates those plants
#' with partial turnkey guarantees.
#' }
#' @references Cox, D.R. and Snell, E.J. (1981) \emph{Applied Statistics:
#' Principles and Examples}. Chapman and Hall.
#' @keywords datasets
"nuclearplants"
#' This matrix gives discrepancies between light water nuclear power
#' plants of two types, seven built on the site of an existing plant
#' and 19 built on new sites. The discrepancies summarize differences
#' in two covariates that are predictive of the cost of building a
#' plant.
#'
#' @source The data appear in Cox, D.R. and Snell, E.J. (1981),
#' \emph{Applied Statistics: Principles and Examples}, p.82 (Chapman
#' and Hall), and are due to W.E. Mooz.
#'
#' @title Dissimilarities of Some U.S. Nuclear Plants
#' @format A matrix with 7 rows and 19 columns
#' @keywords dataset
#' @references Rosenbaum, P.R. (2002), \emph{Observational Studies},
#' Second Edition, p.307 (Springer).
"plantdist"
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