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arXiv 0903.0290math.STstat.TH
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离散观测扩散过程的Monte Carlo极大似然估计

Monte Carlo maximum likelihood estimation for discretely observed diffusion processes

Alexandros Beskos, Omiros Papaspiliopoulos, Gareth Roberts

摘要:

本文介绍了离散观测扩散过程极大似然推断的一种蒙特卡罗方法。该方法给出了无偏和a.s.一类扩散模型的似然函数的连续估计及其在数值例子中的性能是计算有效的。它采用了最近发展的技术,精确模拟扩散,并涉及没有离散化误差。我们表明,在正则性条件下,Monte Carlo极大似然估计收敛a.s.真正的MLE对于数据大小$n\to\infty$,我们表明,蒙特卡罗迭代次数应调整为$\mathcal{O}(n^{1/2})$,我们证明了蒙特卡罗MLE作为真实参数值的估计的一致性。

英文摘要:

This paper introduces a Monte Carlo method for maximum likelihood inference in the context of discretely observed diffusion processes. The method gives unbiased and a.s.\@ continuous estimators of the likelihood function for a family of diffusion models and its performance in numerical examples is computationally efficient. It uses a recently developed technique for the exact simulation of diffusions, and involves no discretization error. We show that, under regularity conditions, the Monte Carlo MLE converges a.s. to the true MLE. For datasize $n\to\infty$, we show that the number of Monte Carlo iterations should be tuned as $\mathcal{O}(n^{1/2})$ and we demonstrate the consistency properties of the Monte Carlo MLE as an estimator of the true parameter value.

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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