#' Cigarette sales
#'
#' Data used in the Abadie et al. (2010) analysis of a cigarette tax in
#' California called Proposition 99.
#'
#' @format A data frame with 1209 rows and 7 variables:
#' \describe{
#' \item{state}{state FIPS number}
#' \item{year}{year of data}
#' \item{cigsale}{cigarette sale per capita (in packs)}
#' \item{lnincome}{log state per capita gdp}
#' \item{beer}{beer consumption per capita}
#' \item{age15to24}{percent of state population aged 15-24 years}
#' \item{retprice}{retail price of cigarettes}
#' \item{prop99}{indicator for years Proposition 99 was in effect}
#' \item{california}{indicator for California}
#' }
#' @source \url{http://economics.mit.edu/files/11859}
"smoking"
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