On this Picostat.com statistics page, you will find information about the klein data set which pertains to Simulation Data for model Two-Stage Least Square (twosls) that corresponds to method 2SLS of systemfit. The klein data set is found in the Zelig R package. Try to load the klein data set in R by issuing the following command at the console data("klein"). This may load the data into a variable called klein. If R says the klein data set is not found, you can try installing the package by issuing this command install.packages("Zelig") and then attempt to reload the data with library("Zelig") followed by data("klein"). Perhaps strangley, if R gives you no output after entering a command, it means the command succeeded. If it succeeded you can see the data by typing klein at the command-line which should display the entire dataset.
If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the klein R data set. The size of this file is about 1,357 bytes.
Simulation Data for model Two-Stage Least Square (twosls) that corresponds to method 2SLS of systemfit
Dataframe contains annual observations of US economy from 1920 to
1940. The columns are, Year, C=Consumption, P=Corporate profits,
P1=Previous year corporate profit,Wtot=Total wage, Wp=Private wage
bill, Wg=Government wage bill,I=Investment,
K1=Previous year capital stock,X=GNP,G=Government spending, T=Taxes,
X1=Previous year GNP, Tm=Year-1931.
A table containing 14 variables ("year", "C", "P", "P1","Wtot", "Wp",
"Wg", "I", "K1","X", "G", "T", "X1", "Tm") and 21 observations.
Dataset imported from https://www.r-project.org.