#' Global VAR Database (1979Q2-2019Q4)
#'
#' The data set of Mohaddes and Raissi (2020) contains economic time series for
#' 33 countries and 3 commodities from 1979Q2 to 2019Q4.
#'
#' @usage data("gvar2019")
#'
#' @format A named list containing the following elements:
#' \describe{
#' \item{\strong{country_data}}{A named list of 33 time-series objects with 163 quarterly
#' observations from 1979Q2 to 2019Q4 of the following variables:
#'
#' \itemize{
#' \item \strong{y:} log real GDP
#' \item \strong{Dp:} rate of inflation
#' \item \strong{r:} short-term interest rate
#' \item \strong{lr:} long-term interest rate
#' \item \strong{ep:} log deflated exchange rate
#' \item \strong{eq:} log real equity prices
#' }
#'
#' The variables are available for the following countries
#' \tabular{lccccccc}{
#' \strong{Country} \tab \strong{Code} \tab \strong{\code{y}} \tab \strong{\code{Dp}} \tab \strong{\code{r}}
#' \tab \strong{\code{lr}} \tab \strong{\code{ep}} \tab \strong{\code{eq}} \cr
#' Argentina \tab AR \tab x \tab x \tab x \tab \tab x \tab x \cr
#' Australia \tab AU \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Austria \tab AT \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Belgium \tab BE \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Brazil \tab BR \tab x \tab x \tab x \tab \tab x \tab \cr
#' Canada \tab CA \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' China \tab CN \tab x \tab x \tab x \tab \tab x \tab \cr
#' Chile \tab CL \tab x \tab x \tab x \tab \tab x \tab x \cr
#' Finland \tab FI \tab x \tab x \tab x \tab \tab x \tab x \cr
#' France \tab FR \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Germany \tab DE \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' India \tab IN \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Indonesia \tab ID \tab x \tab x \tab x \tab \tab x \tab \cr
#' Italy \tab IT \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Japan \tab JP \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Korea \tab KR \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Malaysia \tab MY \tab x \tab x \tab x \tab \tab x \tab x \cr
#' Mexico \tab MX \tab x \tab x \tab x \tab \tab x \tab \cr
#' Netherlands \tab NL \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Norway \tab NO \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' New Zealand \tab NZ \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Peru \tab PE \tab x \tab x \tab x \tab \tab x \tab \cr
#' Philippines \tab PH \tab x \tab x \tab x \tab \tab x \tab x \cr
#' South Africa \tab ZA \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Saudi Arabia \tab SA \tab x \tab x \tab \tab \tab x \tab \cr
#' Singapore \tab SG \tab x \tab x \tab x \tab \tab x \tab x \cr
#' Spain \tab ES \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Sweden \tab SE \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Switzerland \tab CH \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' Thailand \tab TH \tab x \tab x \tab x \tab \tab x \tab x \cr
#' Turkey \tab TR \tab x \tab x \tab x \tab \tab x \tab \cr
#' United Kingdom \tab GB \tab x \tab x \tab x \tab x \tab x \tab x \cr
#' USA \tab US \tab x \tab x \tab x \tab x \tab \tab x \cr
#'}
#' }
#' \item{\strong{global_data}}{A time-series object containing 163 quarterly observations
#' from 1979Q2 to 2019Q4 of the following variables
#' \itemize{
#' \item \strong{poil:} log of oil prices
#' \item \strong{pmat:} log of agricultural raw material prices
#' \item \strong{pmetal:} log of metals prices
#' }}
#'
#' \item{\strong{region_weights}}{A time-series object containing annual data on PPP-GDP
#' from 1990 to 2018 for the countries listed above.}
#'
#' \item{\strong{weight_data}}{A named list of time-series objects containing annual data on
#' trade flows from 1980 to 2016 for the countries listed above.}
#' }
#'
#' @details The variables in \code{country_data} were constructed as
#' \itemize{
#' \item \strong{y:} \eqn{y_{it} = ln(GDP_{it})}
#' \item \strong{Dp:} \eqn{Dp_{it} = p_{it} - p_{it-1}} with \eqn{p_{it} = ln(CPI_{it})}
#' \item \strong{r:} \eqn{r_{it} = 0.25 ln(1 + R_{it}^{S} / 100)}
#' \item \strong{lr:} \eqn{r_{it} = 0.25 ln(1 + R_{it}^{L} / 100)}
#' \item \strong{ep:} \eqn{ep_{it} = ln(E_{it} / CPI_{it})}
#' \item \strong{eq:} \eqn{eq_{it} = ln(EQ_{it} / CPI_{it})}
# \item \strong{cred:} \eqn{credit_{it} = ln(CREDIT_{it} / CPI_{it})}
#' }
#' where \eqn{GDP_{it}} is real gross domestic product at time \eqn{t} for country \eqn{i}, \eqn{CPI_{it}}
#' is the consumer price index, \eqn{E_{it}} is the nominal exchange rate in terms of US dollar, \eqn{EQ_{it}}
#' is the nominal equity price index, and \eqn{R_{it}^{S}} and \eqn{R_{it}^{L}} are short-term and long-term
#' interest rates, respectively.
#'
#' See Mohaddes and Raissi (2020) for further details on the sources and compilation of the data set.
#'
#' @references
#'
#' Mohaddes, K., & Raissi, M. (2020). \emph{Compilation, revision and updating of the global VAR (GVAR) database, 1979Q2--2019Q4} (mimeo). University of Cambridge: Judge Business School.
#' The paper and dataset can be downloaded from \href{https://www.mohaddes.org/gvar}{https://www.mohaddes.org/gvar}.
#'
"gvar2019"
#' Dees, di Mauro, Pesaran & Smith data set
#'
#' The data set of Dees et al. (2007) contains economic time series for
#' 26 economies and oil prices from 1979Q2 to 2003Q4.
#'
#' @usage data("dees2007")
#'
#' @format A named list containing the following elements:
#' \describe{
#' \item{\strong{country_data}}{A named list of 26 time-series objects with 99 quarterly
#' observations from 1979Q2 to 2003Q4 of the following variables:
#'
#' \itemize{
#' \item \strong{y:} log real GDP
#' \item \strong{p:} rate of inflation
#' \item \strong{rs:} short-term interest rate
#' \item \strong{rl:} long-term interest rate
#' \item \strong{q:} log real equity prices
#' \item \strong{ep:} log real exchange rate
#' }
#' }
#'
#' \item{\strong{global_data}}{A time-series object containing 99 quarterly observations
#' from 1979Q2 to 2003Q4 of log of oil prices.}
#' \item{\strong{weight_data}}{A named \eqn{26 \times 26} weight matrix.}
#' \item{\strong{dees_specs}}{A named list of country model specifications as used in
#' Dees et al. (2007).}
#' }
#'
#' See the supplementary material to Dees et al. (2007) for further details on the
#' sources and compilation of the data (\url{http://qed.econ.queensu.ca/jae/datasets/dees001/}).
#'
#' @references
#'
#' Dees, S., di Mauro, F., Pesaran, M. H., & Smith, V. (2007). Exploring the
#' international linkages of the euro area: A global VAR analysis.
#' \emph{Journal of Applied Econometrics, 22}(1), 1--38.
#' \url{https://doi.org/10.1002/jae.932}
#'
"dees2007"
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