Cox-Ingersoll-Ross模型中的变化检测
Change detection in the Cox-Ingersoll-Ross model
摘要:
我们提出了一个变化检测方法的著名的Cox-Ingersoll-Ross模型。该模型广泛应用于金融数学中,因此检测其参数的变化至关重要。我们开发的过程中的漂移参数的单侧和双侧测试程序。检验过程是基于离散时间最小二乘估计激励的估计,其渐近分布不变假设下是布朗桥。证明了该检验的渐近弱相合性,并在变点在某一时刻发生变化的备择假设下,得到了变点估计的渐近性质。
英文摘要:
We propose a change detection method for the famous Cox--Ingersoll--Ross model. This model is widely used in financial mathematics and therefore detecting a change in its parameters is of crucial importance. We develop one- and two-sided testing procedures for both drift parameters of the process. The test process is based on estimators that are motivated by the discrete time least-squares estimators, and its asymptotic distribution under the no-change hypothesis is that of a Brownian bridge. We prove the asymptotic weak consistence of the test, and derive the asymptotic properties of the change-point estimator under the alternative hypothesis of change at one point in time.
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