#' @importFrom tibble tibble
NULL

#' Dow Jones Industrial Average, 1885-Present
#'
#' This data set contains the value of the Dow Jones Industrial Average
#'  on daily close for all available dates (to the best of my knowledge) from 1885
#'  to the most recently concluded calendar year. Extensions shouldn't be too
#'  difficult with existing packages.
#'
#' @format A data frame with 36951 observations on the following 2 variables.
#' \describe{
#' \item{\code{date}}{the date}
#' \item{\code{value}}{the value of the the Dow Jones Industrial Average at daily close}
#' }
#'
#' @details Observations before October 7, 1896 are from the single Dow Jones Average.
#' Observations from October 7, 1896 to July 30, 1914 are from the first DJIA.
#' Observations before the 1914 closure of the first DJIA in July 1914 come from MeasuringWorth.
#' Observations from its reopening in Dec. 12, 1914 to January 28, 1985 come from
#' Pinnacle Systems. Observations from January 29, 1985 to the most recent observation come
#' from a \code{quantmod} call.
#'
#' @references Samuel H. Williamson, 'Daily Closing Value of the Dow Jones Average, 1885 to Present,' MeasuringWorth, 2019.
#'
#' Jeffrey A. Ryan and Joshua M. Ulrich, '\code{quantmod}: Quantitative Financial Modelling Framework,' 2018.
#'
"DJIA"