#' @title Weight matrix for counties in Alabama, US
#'
#' @description This dataset specifies the four nearest neighboring
#' counties of 67 counties in Alabama, US. All counties that satisfy
#' this criteria were assigned a weight of 0.25.
#'
#' @docType data
#' @keywords datasets
#' @name W_votes
#' @usage data(W_votes)
#' @references Pace, R. K. and R. Barry. 1997. Quick Computation of
#' Spatial Autoregressive Estimators. Geographical Analysis, 29, 232-47.
#' Data can be downloaded from
#' http://www.spatial-econometrics.com/html/jplv7.zip
#' @format A matrix with 67 rows and 67 columns
##
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