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Identification of Impulse Response Functions for Nonlinear Dynamic Models

Author

Listed:
  • Christian Gourieroux
  • Quinlan Lee
Abstract
We explore the issues of identification for nonlinear Impulse Response Functions in nonlinear dynamic models and discuss the settings in which the problem can be mitigated. In particular, we introduce the nonlinear autoregressive representation with Gaussian innovations and characterize the identified set. This set arises from the multiplicity of nonlinear innovations and transformations which leave invariant the standard normal density. We then discuss possible identifying restrictions, such as non-Gaussianity of independent sources, or identifiable parameters by means of learning algorithms, and the possibility of identification in nonlinear dynamic factor models when the underlying latent factors have different dynamics. We also explain how these identification results depend ultimately on the set of series under consideration.

Suggested Citation

  • Christian Gourieroux & Quinlan Lee, 2025. "Identification of Impulse Response Functions for Nonlinear Dynamic Models," Papers 2506.13531, arXiv.org, revised Jul 2025.
    • Handle: RePEc:arx:papers:2506.13531
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    References listed on IDEAS

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