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Orbital Priors for Time-Series Models

Andrzej Kocięcki

MPRA Paper from University Library of Munich, Germany

Abstract: We propose the unified approach to construct the non–informative prior for time–series econometric models that are invariant under some group of transformations. We show that this invariance property characterizes some of the most popular models hence the applicability of the proposed framework is quite general. The suggested prior enjoys many desirable properties both from the Bayesian and non–Bayesian perspective. We provide detailed derivations of our prior in many standard time–series models including, AutoRegressions (AR), Vector AutoRegressions (VAR), Structural VAR and Error Correction Models (ECM).

Keywords: Bayesian; Model invariance; Groups; Free group action; Orbit; Right Haar measure; Orbital decomposition; Maximal invariant; Cross section; Intersubjective prior; Vector AutoRegression (VAR); Structural VAR; Error Correction Model (ECM) (search for similar items in EconPapers)
JEL-codes: C10 C11 C32 (search for similar items in EconPapers)
Date: 2012-11-23
New Economics Papers: this item is included in nep-ecm and nep-ets
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