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Robust Bayesian Estimation Of Autoregressive‐‐Moving‐Average Models

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  • Glen Barnett
  • Robert Kohn
  • Simon Sheather

Abstract

A Bayesian approach is presented for modeling a time series by an autoregressive‐‐moving‐average model. The treatment is robust to innovation and additive outliers and identifies such outliers. It enforces stationarity on the autoregressive parameters and invertibility on the moving‐average parameters, and takes account of uncertainty about the correct model by averaging the parameter estimates and forecasts of future observations over the set of permissible models. Posterior moments and densities of unknown parameters and observations are obtained by Markov chain Monte Carlo in O(n) operations, where n is the sample size. The methodology is illustrated by applying it to a data set previously analyzed by Martin, Samarov and Vandaele (Robust methods for ARIMA models. Applied Time Series Analysis of Economic Data, ASA‐‐Census‐‐NBER Proceedings of the Conference on Applied Time Series Analysis of Economic Data (ed. A. Zellner), 1983, pp. 153‐‐69) and to a simulated example.

Suggested Citation

  • Glen Barnett & Robert Kohn & Simon Sheather, 1997. "Robust Bayesian Estimation Of Autoregressive‐‐Moving‐Average Models," Journal of Time Series Analysis, Wiley Blackwell, vol. 18(1), pages 11-28, January.
    • Handle: RePEc:bla:jtsera:v:18:y:1997:i:1:p:11-28
    DOI: 10.1111/1467-9892.00036
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    Cited by:

    1. Ayman A. Amin & Saeed A. Alghamdi, 2023. "Bayesian Identification Procedure for Triple Seasonal Autoregressive Models," Mathematics, MDPI, vol. 11(18), pages 1-13, September.

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