Soit Y une diffusion de Ornstein–Uhlenbeck dirigée par un processus Markovien de saut X stationnaire et ergodique : , . On connaît des conditions d'ergodicité pour Y. Ici on s'intéresse à la queue de la loi stationnaire de ce modèle. Par des méthodes de discrétisation et de renouvellement, on donne une caractérisation complète des deux seuls cas possibles : queue polynômiale ou existence de moment à tout ordre.
Let Y be a Ornstein–Uhlenbeck diffusion governed by a stationary and ergodic Markov jump process X, i.e. , . Ergodicity conditions for Y have been obtained. Here we investigate the tail property of the stationary distribution of this model. A characterization of the only two possible cases is established: light tail or polynomial tail. Our method is based on discretizations and renewal theory.
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@article{CRMATH_2004__339_9_643_0, author = {de Saporta, Beno{\^\i}te and Yao, Jian-Feng}, title = {Tail of a linear diffusion with {Markov} switching}, journal = {Comptes Rendus. Math\'ematique}, pages = {643--646}, publisher = {Elsevier}, volume = {339}, number = {9}, year = {2004}, doi = {10.1016/j.crma.2004.09.022}, language = {en}, url = {http://www.numdam.org/articles/10.1016/j.crma.2004.09.022/} }
TY - JOUR AU - de Saporta, Benoîte AU - Yao, Jian-Feng TI - Tail of a linear diffusion with Markov switching JO - Comptes Rendus. Mathématique PY - 2004 SP - 643 EP - 646 VL - 339 IS - 9 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/j.crma.2004.09.022/ DO - 10.1016/j.crma.2004.09.022 LA - en ID - CRMATH_2004__339_9_643_0 ER -
%0 Journal Article %A de Saporta, Benoîte %A Yao, Jian-Feng %T Tail of a linear diffusion with Markov switching %J Comptes Rendus. Mathématique %D 2004 %P 643-646 %V 339 %N 9 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.crma.2004.09.022/ %R 10.1016/j.crma.2004.09.022 %G en %F CRMATH_2004__339_9_643_0
de Saporta, Benoîte; Yao, Jian-Feng. Tail of a linear diffusion with Markov switching. Comptes Rendus. Mathématique, Tome 339 (2004) no. 9, pp. 643-646. doi : 10.1016/j.crma.2004.09.022. http://www.numdam.org/articles/10.1016/j.crma.2004.09.022/
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