On invariant measures of stochastic recursions in a critical case

Details On invariant measures of stochastic recursions in a critical case On invariant measures of stochastic recursions in a critical case

2007-10-19

arxiv.org/abs/0710.3687v1

Annals of Applied Probability 2007, Vol. 17, No. 4, 1245-1272

Mathematics

Probability

Published in at http://dx.doi.org/10.1214/105051607000000140 the Annals of Applied Probability (http://www.imstat.org/aap/) by

Scientific paper

10.1214/105051607000000140

We consider an autoregressive model on $\mathbb{R}$ defined by the recurrence equation $X_n=A_nX_{n-1}+B_n$, where $\{(B_n,A_n)\}$ are i.i.d. random variables valued in $\mathbb{R}\times\mathbb{R}^+$ and $\mathbb {E}[\log A_1]=0$ (critical case). It was proved by Babillot, Bougerol and Elie that there exists a unique invariant Radon measure of the process $\{X_n\}$. The aim of the paper is to investigate its behavior at infinity. We describe also stationary measures of two other stochastic recursions, including one arising in queuing theory.

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