Autoregressive Functions Estimation in Nonlinear Bifurcating Autoregressive Models

Abstract : Bifurcating autoregressive processes, which can be seen as an adaptation of au-toregressive processes for a binary tree structure, have been extensively studied during the last decade in a parametric context. In this work we do not specify any a priori form for the two autoregressive functions and we use nonparametric techniques. We investigate both nonasymp-totic and asymptotic behavior of the Nadaraya-Watson type estimators of the autoregressive functions. We build our estimators observing the process on a finite subtree denoted by Tn, up to the depth n. Estimators achieve the classical rate |Tn| −β/(2β+1) in quadratic loss over Hölder classes of smoothness. We prove almost sure convergence, asymptotic normality giving the bias expression when choosing the optimal bandwidth and a moderate deviations principle. Our proofs rely on specific techniques used to study bifurcating Markov chains. Finally, we address the question of asymmetry and develop an asymptotic test for the equality of the two autoregressive functions.
Type de document :
Pré-publication, Document de travail
2016
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https://hal.archives-ouvertes.fr/hal-01159255
Contributeur : Adélaïde Olivier <>
Soumis le : jeudi 11 février 2016 - 19:56:55
Dernière modification le : samedi 18 février 2017 - 01:10:46

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  • HAL Id : hal-01159255, version 2
  • ARXIV : 1506.01842

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Siméon Valère Bitseki Penda, Adélaïde Olivier. Autoregressive Functions Estimation in Nonlinear Bifurcating Autoregressive Models. 2016. <hal-01159255v2>

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