R/earns.R

In wooldridge: 115 Data Sets from "Introductory Econometrics: A Modern Approach, 7e" by Jeffrey M. Wooldridge

#' earns
#'
#' Wooldridge Source: Economic Report of the President, 1989, Table B-47. The data are for the non-farm business sector. Data loads lazily.
#'
#' @section Notes: These data could be usefully updated, but changes in reporting conventions in more recent ERPs may make that difficult.
#'
#' Used in Text: pages 363-364, 398, 407
#'
#' @docType data
#'
#' @usage data('earns')
#'
#' @format A data.frame with 41 observations on 14 variables:
#' \itemize{
#'  \item \strong{year:} 1947 to 1987
#'  \item \strong{wkearns:} avg. real weekly earnings
#'  \item \strong{wkhours:} avg. weekly hours
#'  \item \strong{outphr:} output per labor hour
#'  \item \strong{hrwage:} wkearns/wkhours
#'  \item \strong{lhrwage:} log(hrwage)
#'  \item \strong{loutphr:} log(outphr)
#'  \item \strong{t:} time trend:  t=1 to 47
#'  \item \strong{ghrwage:} lhrwage - lhrwage[_n-1]
#'  \item \strong{goutphr:} loutphr - loutphr[_n-1]
#'  \item \strong{ghrwge_1:} ghrwage[_n-1]
#'  \item \strong{goutph_1:} goutphr[_n-1]
#'  \item \strong{goutph_2:} goutphr[_n-2]
#'  \item \strong{lwkhours:} log(wkhours)
#' }
#' @source \url{https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041}
#' @examples  str(earns)
"earns"