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arXiv 2102.06871math.STstat.TH
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离散观测遍历扩散过程变点的估计

Estimation for change point of discretely observed ergodic diffusion processes

Yozo Tonaki, Yusuke Kaino, Masayuki Uchida

摘要:

本文讨论了离散观测下遍历扩散过程的变点问题。Tonaki等人(2020)提出了自适应测试,用于检测遍历扩散模型中扩散和漂移参数的变化。当通过该方法检测到任何变化时,要考虑的下一个问题是变化点在哪里。因此,我们提出的方法来估计两种情况下的参数的变化点:的情况下,有一个变化的扩散参数,和的情况下,没有变化的扩散参数,但在漂移参数的变化。此外,我们提出的收敛速度和分布结果的变点估计。文中还给出了一些算例和仿真结果。

英文摘要:

We treat the change point problem in ergodic diffusion processes from discrete observations. Tonaki et al. (2020) proposed adaptive tests for detecting changes in the diffusion and drift parameters in ergodic diffusion models. When any changes are detected by this method, the next question to be considered is where the change point is. Therefore, we propose the method to estimate the change point of the parameter for two cases: the case where there is a change in the diffusion parameter, and the case where there is no change in the diffusion parameter but a change in the drift parameter. Furthermore, we present rates of convergence and distributional results of the change point estimators. Some examples and simulation results are also given.

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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