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arXiv 0811.1917math.STmath.PRstat.TH
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自回归过程的聚集与长记忆

Aggregation of autoregressive processes and long memory

Didier Dacunha-Castelle, Lisandro J. Fermín

摘要:

本文研究了AR过程和广义Ornstein-Uhlenbeck过程的集结。随机极点的混合谱密度是主要的工具。在这种情况下,我们将我们的结果应用于双随机相互作用过程的聚合,参见Dacunha-Castelle和Fermin(2006)。因此,我们研究自回归过程的聚集和长记忆之间的关系,考虑复杂的相互作用结构。我们精确的一个非常有趣的定性现象:如何长的记忆创建取决于极点浓度附近的边界的稳定性(测量Prokhorov意义上)。我们的结果推广了Oppenheim和Viano(2004)的结果,并强调了极点的角色散度量在长记忆出现中的重要性。

英文摘要:

We study the aggregation of AR processes and generalized Ornstein-Uhlenbeck (OU) processes. Mixture of spectral densities with random poles are the main tool. In this context, we apply our results for the aggregation of doubly stochastic interactives processes, see Dacunha-Castelle and Fermin (2006). Thus, we study the relationship between aggregation of autoregressive processes and long memory considering complex interaction structures. We precise a very interesting qualitative phenomena: how the long memory creation depends on the poles concentration near to the boundary of stability (measured in the Prokhorov sense). Our results extends the results given by Oppenheim and Viano (2004), and highlight the importance of the angular dispersion measure of poles in the appearance of the long memory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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