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State Correlation and Forecasting: A Bayesian Approach Using Unobserved Components Models

Luis Uzeda ()

Staff Working Papers from Bank of Canada

Abstract: Implications for signal extraction from specifying unobserved components (UC) models with correlated or orthogonal innovations have been well investigated. In contrast, the forecasting implications of specifying UC models with different state correlation structures are less well understood. This paper attempts to address this gap in light of the recent resurgence of studies adopting UC models for forecasting purposes. Four correlation structures for errors are entertained: orthogonal, correlated, perfectly correlated innovations, and a new approach that combines features from two contrasting cases, namely, orthogonal and perfectly correlated innovations. Parameter space restrictions associated with different correlation structures and their connection with forecasting are discussed within a Bayesian framework. As perfectly correlated innovations reduce the covariance matrix rank, a Markov Chain Monte Carlo sampler, which builds upon properties of Toeplitz matrices and recent advances in precision-based algorithms, is developed. Our results for several measures of U.S. inflation indicate that the correlation structure between state variables has important implications for forecasting performance as well as estimates of trend inflation.

Keywords: Econometric and statistical methods; Inflation and prices (search for similar items in EconPapers)
JEL-codes: C C1 C11 C15 C5 C51 C53 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-ets, nep-for and nep-ore
Date: 2018
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Working Paper: State Correlation and Forecasting: A Bayesian Approach Using Unobserved Components Models (2016) Downloads
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Persistent link: https://EconPapers.repec.org/RePEc:bca:bocawp:18-14

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