What information can be learned from the Eigenvalues?

Dynare help (legacy posts)
1

Dear all,

What information can you learn from the below eigenvalues as there are three values equal to 1 and one value is infinite?
EIGENVALUES:
Modulus Real Imaginary

   1.583e-16        1.583e-16                0
        0.02            -0.02                0
        0.16             0.16                0
      0.3383           0.3383                0
        0.64             0.64                0
      0.7464           0.7464                0
        0.76             0.76                0
        0.76             0.76                0
         0.8              0.8                0
        0.99             0.99                0
        0.99             0.99                0
           1                1                0
           1                1                0
           1                1                0
       1.118            1.075            0.304
       1.118            1.075           -0.304
       1.128            1.113           0.1842
       1.128            1.113          -0.1842
       1.932            1.782           0.7467
       1.932            1.782          -0.7467
           2                2                0
         Inf              Inf                0

There are 8 eigenvalue(s) larger than 1 in modulus
for 8 forward-looking variable(s)

The rank condition is verified.

2

The generalized eigenvalues are relevant for the Blanchard-Kahn conditions. The infinite one is not noteworthy. The unit roots are the ones to keep in mind. They will usually imply that shocks may have permanent effects.

3

Thanks professor, does that mean there are three unit root process in the model?

4

It seems so.