Irregular movements in dynamics with an investment adjustment costs model

[FRED]

I am working on the RBC model and incorporating adjustment costs on investment. When generating any shock, the dynamics fluctuate very strongly. Could someone please help me? What should I see?

Thanks!

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[jpfeifer]

See e.g.

Oscilating or alternating IRFs

It means that there is a complex eigenvalue leading to oscillations. Usually, when people have this problem in the forum, it comes from them ignoring the Dynare timing convention and then torturing the timing until the BK conditions are satisfied. When doing so, the correct economic timing is ignored and oscillating IRFs result.

[FRED]

Thank you professor!