Bayesian analysis of multiple break-points threshold ARMA model with exogenous inputs

Yuqin Sun, Yawen Wang, Yan Li and Wei Zhu

Communications in Statistics - Theory and Methods, 2023, vol. 52, issue 24, 8677-8695

Abstract: In this paper, we introduce a Bayesian statistical inference approach for multiple break-points threshold autoregressive moving average model with exogenous inputs (MB-TARMAX) which change in state space and time domain. Based on the appropriate prior information of parameters, we give the full conditional posterior distribution of parameters including the thresholds and break-points. In order to obtain the estimates of parameters, we employ the Markov chain Monte Carlo (MCMC) method via Gibbs sampler with Metropolis-Hastings algorithm. Compared with Metropolis-Hastings algorithm, we apply Hamiltonian Monte Carlo algorithm to avoid the slow space exploration from simple random walk and improve the sampling efficiency. As applications, we demonstrate the effectiveness of our method from simulation experiments and a real example.

Date: 2023
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DOI: 10.1080/03610926.2022.2068030

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