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Time varying dimension models

Koop, Gary and Strachan, Rodney and Leon-Gonzalez, Roberto and Chan, Joshua (2012) Time varying dimension models. Journal of Business and Economic Statistics. ISSN 0735-0015 (In Press)

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    Abstract

    Time varying parameter (TVP) models have enjoyed an increasing popularity in empirical macroeconomics. However, TVP models are parameter-rich and risk over-fitting unless the dimension of the model is small. Motivated by this worry, this paper proposes several Time Varying dimension (TVD) models where the dimension of the model can change over time, allowing for the model to automatically choose a more parsimonious TVP representation, or to switch between different parsimonious representations. Our TVD models all fall in the category of dynamic mixture models. We discuss the properties of these models and present methods for Bayesian inference. An application involving US inflation forecasting illustrates and compares the different TVD models. We find our TVD approaches exhibit better forecasting performance than several standard benchmarks and shrink towards parsimonious specifications.

    Item type: Article
    ID code: 39967
    Keywords: Bayesian models, time varying parameter model, Economic Theory, Economics and Econometrics, Social Sciences (miscellaneous), Statistics and Probability, Statistics, Probability and Uncertainty
    Subjects: Social Sciences > Economic Theory
    Department: Strathclyde Business School > Economics
    Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 08 Jun 2012 14:24
    Last modified: 28 Mar 2014 21:45
    URI: http://strathprints.strath.ac.uk/id/eprint/39967

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