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Nonlinear Forecast Error Variance Decompositions with Hermite Polynomials

Quinlan Lee

arXiv 14 Mar 2025 · Econometrics

arXiv:2503.11416 · PDF · DOI · OpenAlex · Extracted main text

Abstract

A novel approach to Forecast Error Variance Decompositions (FEVD) in nonlinear Structural Vector Autoregressive models with Gaussian innovations is proposed, called the Hermite FEVD (HFEVD). This method employs a Hermite polynomial expansion to approximate the future trajectory of a nonlinear process. The orthogonality of Hermite polynomials under the Gaussian density facilitates the construction of the decomposition, providing a separation of shock effects by time horizon, by components of the structural innovation and by degree of nonlinearity. A link between the HFEVD and nonlinear Impulse Response Functions is established and distinguishes between marginal and interaction contributions of shocks. Simulation results from standard nonlinear models are provided as illustrations and an application to fiscal policy shocks is examined.

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30
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30
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Most heavily cited references

The works this paper leans on most, across its whole bibliography — not restricted to papers in our corpus. Ranked by composite intensity, which combines how often a work is mentioned, how many sections mention it, and how much of that falls in the main text rather than the appendix.

ReferenceIntensityMentionsSectionsMain text
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2Kilian, L. and Lütkepohl, H (2017) Structural vector autoregressive analysis0.8434475%
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5Gouriéroux, C., Monfort, A., and Renne, J.-P (2017) Statistical inference for independent component analysis: Application to structural var models0.7373367%
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7Gourieroux, C. and Jasiak, J (2005) Nonlinear innovations and impulse responses with application to var sensitivity0.5112250%
8Gourieroux, C. and Jasiak, J (2023) Generalized covariance estimator0.5112250%
9Gouriéroux, C. and Lee, Q (2024) Forecast relative error decomposition self0.5112250%
10Rahman, S (2017) Wiener–hermite polynomial expansion for multivariate gaussian probability measures0.51121100%

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