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Optimization of the Generalized Covariance Estimator in Noncausal Processes

Gianluca Cubadda, Francesco Giancaterini, Alain Hecq, Joann Jasiak

arXiv 26 Jun 2023 · Econometrics · publishedStatistics and Computing (2024) · 4 citations (OpenAlex)

arXiv:2306.14653 · PDF · DOI · OpenAlex · Extracted main text

Abstract

This paper investigates the performance of the Generalized Covariance estimator (GCov) in estimating and identifying mixed causal and noncausal models. The GCov estimator is a semi-parametric method that minimizes an objective function without making any assumptions about the error distribution and is based on nonlinear autocovariances to identify the causal and noncausal orders. When the number and type of nonlinear autocovariances included in the objective function of a GCov estimator is insufficient/inadequate, or the error density is too close to the Gaussian, identification issues can arise. These issues result in local minima in the objective function, which correspond to parameter values associated with incorrect causal and noncausal orders. Then, depending on the starting point and the optimization algorithm employed, the algorithm can converge to a local minimum. The paper proposes the use of the Simulated Annealing (SA) optimization algorithm as an alternative to conventional numerical optimization methods. The results demonstrate that SA performs well when applied to mixed causal and noncausal models, successfully eliminating the effects of local minima. The proposed approach is illustrated by an empirical application involving a bivariate commodity price series.

Citation extraction

36
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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
1Gourieroux, C., Jasiak, J (2022) Generalized covariance estimator self1.00073100%
2Gourieroux, C., Jasiak, J (2022) Nonlinear forecasts and impulse responses for causal-noncausal (s) var models self0.92843100%
3Lanne, M., Saikkonen, P (2011) Noncausal autoregressions for economic time series0.92843100%
4Gourieroux, C., Jasiak, J (2017) Noncausal vector autoregressive process: Representation, identification and semi-parametric estimation self0.874102100%
5Lanne, M., Saikkonen, P (2013) Noncausal vector autoregression0.81142100%
6Davis, R.A., Song, L (2020) Noncausal vector ar processes with application to economic time series0.73732100%
7Hecq, A., Lieb, L., Telg, S (2016) Identification of mixed causal-noncausal models in finite samples self0.73732100%
8Breidt, F.J., Davis, R.A., Lh, K.S., Rosenblatt, M (1991) Maximum likelihood estimation for noncausal autoregressive processes0.64441100%
9Hecq, A., Velasquez-Gaviria, D (2022) Spectral estimation for mixed causal-noncausal autoregressive models self0.64422100%
10Kirkpatrick, S., Gelatt Jr, C.D., Vecchi, M.P (1983) Optimization by simulated annealing0.64422100%

Showing the top 10 of 36 scored citations.

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