# Replication of "Model 1" from L. Klein, "Economic 
# Fluctuations in the United States, 1921-1941", 
# New York: John Wiley and Sons, 1950.

open klein.gdt

series W = Wp + Wg
series A = t + (1918 - 1931)
series K1 = K(-1)

# set the model up as a system
"Klein Model 1" <- system
 equation C 0 P P(-1) W 
 equation I 0 P P(-1) K1
 equation Wp 0 X X(-1) A
 identity P = X - T - Wp
 identity W = Wp + Wg
 identity X = C + I + G
 identity K = K1 + I
 endog C I Wp P W X K
end system

# and estimate it in various ways
estimate "Klein Model 1" method=ols
estimate "Klein Model 1" method=tsls
estimate "Klein Model 1" method=3sls
estimate "Klein Model 1" method=fiml --verbose
estimate "Klein Model 1" method=liml