R/data_blp.R

In lachlandeer/demandr: Nested Logit Demand Estimation with Aggregate Market Shares

#' Automobile Sales in the United States
#'
#'
#' Annual model-level car sales in the United States
#'
#' Data Source: Berry, Levinsohn and Pakes, 1995, "Automobile Prices in Market Equilibrium",
#' Econometrica
#'
#' @format A data.frame with 2217 observations on 13 variables:
#' \itemize{
#'  \item \strong{model_name:} Name of car model
#'  \item \strong{model_id:} Numeric identifier for car model
#'  \item \strong{firm_id:} Numeric identifier for production firm
#'  \item \strong{time_id:} Numeric identifier for year of sale
#'  \item \strong{price:} price - mean(price)
#'  \item \strong{mpd:} Miles per dollar
#'  \item \strong{air:} ==1 if car has airconditioning
#'  \item \strong{mpg:} Miles per gallon
#'  \item \strong{space:} Space inside vehicle
#'  \item \strong{hpwt:} Horsepower per pound
#'  \item \strong{share:} Market share of vehicle
#'  \item \strong{outshr:} Outside share
#'  \item \strong{y:} outcome variable defined as log(share) - log(outshr)
#' }
#'
#' @docType data
#' @name blp_1995
#' @usage data('blp_1995')
#' @examples  str(blp_1995)
"blp_1995"