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Improved Frequentist Prediction Intervals for Autoregressive Models by Simulation

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Helske, J., & Nyblom, J. (2015). Improved Frequentist Prediction Intervals for Autoregressive Models by Simulation. In S. J. Koopman, & N. Shephard (Eds.), Unobserved Components and Time Series Econometrics (pp. 291-309). Oxford University Press. https://doi.org/10.1093/acprof:oso/9780199683666.003.0013
Authors
Helske, Jouni |
Nyblom, Jukka
Editors
Koopman, Siem Jan |
Shephard, Neil
Date
2015
Discipline
TilastotiedeStatistics
Copyright
© 2015 Oxford University Press. This is a final draft version of an article whose final and definitive form has been published by OUP. Published in this repository with the kind permission of the publisher.

 
It is well known that the so called plug-in prediction intervals for autoregressive processes, with Gaussian disturbances, are too narrow, i.e. the coverage probabilities fall below the nominal ones. However, simulation experiments show that the formulas borrowed from the ordinary linear regression theory yield one-step prediction intervals, which have coverage probabilities very close to what is claimed. From a Bayesian point of view the resulting intervals are posterior predictive intervals when uniform priors are assumed for both autoregressive coefficients and logarithm of the disturbance variance. This finding opens the path how to treat multi-step prediction intervals which are obtained easily by simulation either directly from the posterior distribution or using importance sampling. A notable improvement is gained in frequentist coverage probabilities. An application of the method to forecasting the annual gross domestic product growth in the United Kingdom and Spain is given for the period 2002–2011 using the estimation period 1962–2001. ...
Publisher
Oxford University Press
Parent publication ISBN
978-0-19-968366-6
Is part of publication
Unobserved Components and Time Series Econometrics
Keywords
prediction intervals autoregressive models simulointi
DOI
https://doi.org/10.1093/acprof:oso/9780199683666.003.0013
URI

http://urn.fi/URN:NBN:fi:jyu-201603141839

Publication in research information system

https://converis.jyu.fi/converis/portal/detail/Publication/25517267

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