diff --git a/R/data.R b/R/data.R
index f8681c0..c7cc7e7 100644
--- a/R/data.R
+++ b/R/data.R
@@ -22,7 +22,7 @@
 #' @keywords datasets
 "denmark"
 
-#' The UK earnings equation data
+#' The UK earnings equation data from Pesaran et al. (2001)
 #'
 #' This data set contains the series used by Pesaran et al. (2001) for estimating the UK earnings equation.
 #' The clean format of the data retrieved from the Data Archive of Natsiopoulos and Tzeremes (2022).
@@ -53,3 +53,31 @@
 #' \doi{10.1002/jae.2919}
 #' @keywords datasets
 "PSS2001"
+
+#' The UK earnings equation data from Natsiopoulos and Tzeremes (2022)
+#'
+#' This data set contains the series used by Natsiopoulos and Tzeremes (2022) for re-estimating the UK earnings equation.
+#' The clean format of the data retrieved from the Data Archive of Natsiopoulos and Tzeremes (2022).
+#'
+#' An object of class "zooreg" "zoo".
+#'
+#' @format A time-series object with 196 rows and 9 variables. Time period from 1971:Q1
+#' until 2019:Q4.
+#' \describe{
+#'   \item{time}{time variable}
+#'   \item{w}{real wage}
+#'   \item{Prod}{labor productivity}
+#'   \item{UR}{unemployment rate}
+#'   \item{Wedge}{wedge effect}
+#'   \item{Union}{union power}
+#'   \item{D7475}{income policies 1974:Q1-1975:Q4}
+#'   \item{D7579}{income policies 1975:Q1-1979:Q4}
+#'   \item{UnionR}{union membership}
+#' }
+#' @source \url{http://qed.econ.queensu.ca/jae/datasets/natsiopoulos001/}
+#' @references Kleanthis Natsiopoulos and Nickolaos G. Tzeremes, (2022), "ARDL bounds test for
+#' Cointegration: Replicating the Pesaran et al. (2001) Results for the UK Earnings Equation Using R",
+#' \emph{Journal of Applied Econometrics}, \bold{37, 5}, 1079--1090.
+#' \doi{10.1002/jae.2919}
+#' @keywords datasets
+"NT2022"
diff --git a/data/NT2022.rda b/data/NT2022.rda
new file mode 100644
index 0000000..1dac245
Binary files /dev/null and b/data/NT2022.rda differ
diff --git a/man/NT2022.Rd b/man/NT2022.Rd
new file mode 100644
index 0000000..854988b
--- /dev/null
+++ b/man/NT2022.Rd
@@ -0,0 +1,41 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/data.R
+\docType{data}
+\name{NT2022}
+\alias{NT2022}
+\title{The UK earnings equation data from Natsiopoulos and Tzeremes (2022)}
+\format{
+A time-series object with 196 rows and 9 variables. Time period from 1971:Q1
+until 2019:Q4.
+\describe{
+  \item{time}{time variable}
+  \item{w}{real wage}
+  \item{Prod}{labor productivity}
+  \item{UR}{unemployment rate}
+  \item{Wedge}{wedge effect}
+  \item{Union}{union power}
+  \item{D7475}{income policies 1974:Q1-1975:Q4}
+  \item{D7579}{income policies 1975:Q1-1979:Q4}
+  \item{UnionR}{union membership}
+}
+}
+\source{
+\url{http://qed.econ.queensu.ca/jae/datasets/natsiopoulos001/}
+}
+\usage{
+NT2022
+}
+\description{
+This data set contains the series used by Natsiopoulos and Tzeremes (2022) for re-estimating the UK earnings equation.
+The clean format of the data retrieved from the Data Archive of Natsiopoulos and Tzeremes (2022).
+}
+\details{
+An object of class "zooreg" "zoo".
+}
+\references{
+Kleanthis Natsiopoulos and Nickolaos G. Tzeremes, (2022), "ARDL bounds test for
+Cointegration: Replicating the Pesaran et al. (2001) Results for the UK Earnings Equation Using R",
+\emph{Journal of Applied Econometrics}, \bold{37, 5}, 1079--1090.
+\doi{10.1002/jae.2919}
+}
+\keyword{datasets}
diff --git a/man/PSS2001.Rd b/man/PSS2001.Rd
index 4dbab04..15d32f6 100644
--- a/man/PSS2001.Rd
+++ b/man/PSS2001.Rd
@@ -3,7 +3,7 @@
 \docType{data}
 \name{PSS2001}
 \alias{PSS2001}
-\title{The UK earnings equation data}
+\title{The UK earnings equation data from Pesaran et al. (2001)}
 \format{
 A time-series object with 112 rows and 7 variables. Time period from 1970:Q1
 until 1997:Q4.