#' crime3
#'
#' Wooldridge Source: E. Eide (1994), Economics of Crime: Deterrence of the Rational Offender. Amsterdam: North Holland. The data come from Tables A3 and A6. Data loads lazily.
#'
#' @section Notes: These data are for the years 1972 and 1978 for 53 police districts in Norway. Much larger data sets for more years can be obtained for the United States, although a measure of the “clear-up” rate is needed.
#'
#' Used in Text: pages 464-465, 477-478
#'
#' @docType data
#'
#' @usage data('crime3')
#'
#' @format A data.frame with 106 observations on 12 variables:
#' \itemize{
#' \item \strong{district:} district number
#' \item \strong{year:} 72 or 78
#' \item \strong{crime:} crimes per 1000 people
#' \item \strong{clrprc1:} clear-up perc, prior year
#' \item \strong{clrprc2:} clear-up perc, two-years prior
#' \item \strong{d78:} =1 if year = 78
#' \item \strong{avgclr:} (clrprc1 + clrprc2)/2
#' \item \strong{lcrime:} log(crime)
#' \item \strong{clcrime:} change in lcrime
#' \item \strong{cavgclr:} change in avgclr
#' \item \strong{cclrprc1:} change in clrprc1
#' \item \strong{cclrprc2:} change in clrprc2
#' }
#' @source \url{https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041}
#' @examples str(crime3)
"crime3"
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