#' openness
#'
#' Wooldridge Source: D. Romer (1993), “Openness and Inflation: Theory and Evidence,” Quarterly Journal of Economics 108, 869-903. The data are included in the article. Data loads lazily.
#'
#' @section
#'
#' Used in Text: pages 566, 579
#'
#' @docType data
#'
#' @usage data('openness')
#'
#' @format A data.frame with 114 observations on 12 variables:
#' \itemize{
#' \item \strong{open:} imports as percent GDP, '73-
#' \item \strong{inf:} avg. annual inflation, '73-
#' \item \strong{pcinc:} 1980 per capita inc., U.S. $
#' \item \strong{land:} land area, square miles
#' \item \strong{oil:} =1 if major oil producer
#' \item \strong{good:} =1 if 'good' data
#' \item \strong{lpcinc:} log(pcinc)
#' \item \strong{lland:} log(land)
#' \item \strong{lopen:} log(open)
#' \item \strong{linf:} log(inf)
#' \item \strong{opendec:} open/100
#' \item \strong{linfdec:} log(inf/100)
#' }
#' @source \url{https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041}
#' @examples str(openness)
"openness"
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