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#' @title Engel Data
#' @name Engel Data
#' @description Engel food expenditure data used in Koenker and Bassett(1982). This is a regression data set consisting of 235 observations on income and expenditure on food for Belgian working class households.
#' @format A data frame containing 235 observations on 2 variables
#' \describe{
#' \item{income}{annual household income in Belgian francs}
#' \item{foordexp}{annual household food expenditure in Belgian francs}
#' }
#' @references Koenker, R. and Bassett, G (1982) Robust Tests of Heteroscedasticity based on Regression Quantiles; Econometrica 50, 43-61.
#' @docType data
#' @usage data(engel)
#' @keywords datasets
"engel"
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