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Asymptotic behavior of unstable INAR( p ) processes

In this paper the asymptotic behavior of an unstable integer-valued autoregressive model of order p (INAR( p )) is described. Under a natural assumption it is proved that the sequence of appropriately scaled random step functions formed from an unstable INAR( p ) process converges weakly towards a s...

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Bibliographic Details
Published in:Stochastic processes and their applications 2011-03, Vol.121 (3), p.583-608
Main Authors: Barczy, M., Ispány, M., Pap, G.
Format: Article
Language:English
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Summary:In this paper the asymptotic behavior of an unstable integer-valued autoregressive model of order p (INAR( p )) is described. Under a natural assumption it is proved that the sequence of appropriately scaled random step functions formed from an unstable INAR( p ) process converges weakly towards a squared Bessel process. We note that this limit behavior is quite different from that of familiar unstable autoregressive processes of order p . An application for Boston armed robberies data set is presented.
ISSN:0304-4149
1879-209X
DOI:10.1016/j.spa.2010.11.005