rhte: Robust Horvitz-Thompson Estimation

#' The MU284 Population.
#'
#' The MU284 population comes from Sarndal, Swensson, and
#' Wretman (1992, Appendix B) and can be downloaded from Stablib.
#' The data consists of readings from 284 Swedish municipalites.
#' Typically, a Swedish municipality consists of a town and the
#' surrounding area.
#'
#' See Sarndal, Swensson, and Wretman (1991, Appendix B) for more details.
#'
#' @format A data frame with 284 observations on the following 11 variables:
#' \describe{
#'   \item{LABEL}{municipality identifier, running from 1 to 284}
#'   \item{P85}{1985 population in thousands}
#'   \item{P75}{1975 population in thousands}
#'   \item{RMT85}{revenues from the 1985 municipal taxation (in millions of kronor)}
#'   \item{CS82}{number of Conservative seats in municipal council}
#'   \item{SS82}{number of Social-Democratic seats in municipal council}
#'   \item{S82}{total number of seats in municipal council}
#'   \item{ME84}{number of municipal employees in 1984}
#'   \item{REV84}{real estate values according to 1984 assessement (in millions of kronor)}
#'   \item{REG}{geographic region indicator}
#'   \item{CL}{cluster indicator (a cluster consists of a set of neighboring municipalities)}
#' }
#' @references Carl Erik Sarndal, Bengt Swensson, and Jan Wretman (1991).
#' Model Assisted Survey Sampling. New York: Springer.
#' @source \url{http://lib.stat.cmu.edu/datasets/mu284}
#' @examples
#' data(pmu284)
"pmu284"