The Annals of Applied Probability

Stationarity and geometric ergodicity of a class of nonlinear ARCH models

Youssef Saïdi and Jean-Michel Zakoïan

Source: Ann. Appl. Probab. Volume 16, Number 4 (2006), 2256-2271.

Abstract

A class of nonlinear ARCH processes is introduced and studied. The existence of a strictly stationary and β-mixing solution is established under a mild assumption on the density of the underlying independent process. We give sufficient conditions for the existence of moments. The analysis relies on Markov chain theory. The model generalizes some important features of standard ARCH models and is amenable to further analysis.

Primary Subjects: 60G10, 60J05
Secondary Subjects: 62M10, 91B84
Keywords: β-mixing; ergodicity; GARCH-type models; Markov chains; nonlinear time series; threshold models

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Permanent link to this document: http://projecteuclid.org/euclid.aoap/1169065224
Digital Object Identifier: doi:10.1214/105051606000000565

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