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Random coefficients bifurcating autoregressive processes

Benoîte de SaportaAnne Gégout-PetitLaurence Marsalle — 2014

ESAIM: Probability and Statistics

This paper presents a new model of asymmetric bifurcating autoregressive process with random coefficients. We couple this model with a Galton−Watson tree to take into account possibly missing observations. We propose least-squares estimators for the various parameters of the model and prove their consistency, with a convergence rate, and asymptotic normality. We use both the bifurcating Markov chain and martingale approaches and derive new results in both these frameworks.

Nonparametric estimation of the jump rate for non-homogeneous marked renewal processes

Romain AzaïsFrançois DufourAnne Gégout-Petit — 2013

Annales de l'I.H.P. Probabilités et statistiques

This paper is devoted to the nonparametric estimation of the jump rate and the cumulative rate for a general class of non-homogeneous marked renewal processes, defined on a separable metric space. In our framework, the estimation needs only one observation of the process within a long time. Our approach is based on a generalization of the multiplicative intensity model, introduced by Aalen in the seventies. We provide consistent estimators of these two functions, under some assumptions related to...

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