# Eigenvalues with Zero Modulus **URL:** \ **Category:** Dynare help (legacy posts)\ **Created:** [25 July 2014 05:02 UTC](https://forum.dynare.org/t/eigenvalues-with-zero-modulus/4055 "2014-07-25T05:02:31Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![reubenpjacob](https://forum.dynare.org/letter_avatar_proxy/v4/letter/r/e5b9ba/32.png) [@reubenpjacob](https://forum.dynare.org/u/reubenpjacob)\ **Post date:** [25 July 2014 05:02 UTC](https://forum.dynare.org/t/eigenvalues-with-zero-modulus/4055/1 "2014-07-25T05:02:31Z")
Hi All I am playing with a DSGE model of banking and discovered something strange when I used the check command. Many eigenvalues are zero or very close to zero in modulus. For example, ``` Modulus Real Imaginary 0 0 0 0 -0 -0 0 -0 -0 0 -0 -0 0 -0 -0 2.956e-18 2.871e-18 -7.009e-19 9.48e-18 9.471e-18 -4.143e-19 6.683e-17 -6.682e-17 8.935e-19 1.116e-16 1.08e-16 2.829e-17 2.254e-16 2.254e-16 5.296e-19 2.992e-16 -2.99e-16 1.143e-17 5.572e-16 5.565e-16 -2.657e-17 ``` I am not sure what the implications are. The Blanchard-Kahn conditions are associated with forward looking variables and eigenvalues above unity. But zero eigenvalues…are they problematic? My guess is that it indicates that many variables do not play a role in the dynamics. Perhaps I am wrong. Have others experienced the same ‘problem’? cheers Reuben ---
**Author:** ![jpfeifer](https://forum.dynare.org/user_avatar/forum.dynare.org/jpfeifer/32/5044_2.png) [@jpfeifer](https://forum.dynare.org/u/jpfeifer)\ **Post date:** [25 July 2014 09:53 UTC](https://forum.dynare.org/t/eigenvalues-with-zero-modulus/4055/2 "2014-07-25T09:53:50Z")
In terms of modulus, 0 is just a number like any other and indicates nothing problematic. But you are right that a 0 eigenvalue indicates that the model will have less endogenous propagation than one where the eigenvalue would be ceteris paribus bigger in modulus.