arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1707.01705math.STstat.TH
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基于Gamma非对称核的二阶跳扩散模型的局部非参数估计

Local Nonparametric Estimation for Second-Order Jump-Diffusion Model Using Gamma Asymmetric Kernels

Yuping Song, Hanchao Wang

摘要:

讨论了基于Gamma非对称核的二阶跳跃扩散模型中未知一阶和二阶无穷小矩的局部线性光滑估计。在较弱的条件下,我们得到了这些估计在内点和边界点的弱相合性和渐近正态性。基于Gamma非对称核函数的局部线性平滑方法除了具有局部线性估计的简单偏差表示和边界偏差校正等标准性质外,还具有可变带宽、方差减小和抗稀疏设计等优点,并通过有限样本仿真研究进行了验证。最后,我们使用的估计一些高频金融数据的回报。

英文摘要:

This paper discusses the local linear smoothing to estimate the unknown first and second infinitesimal moments in second-order jump-diffusion model based on Gamma asymmetric kernels. Under the mild conditions, we obtain the weak consistency and the asymptotic normality of these estimators for both interior and boundary design points. Besides the standard properties of the local linear estimation such as simple bias representation and boundary bias correction, the local linear smoothing using Gamma asymmetric kernels possess some extra advantages such as variable bandwidth, variance reduction and resistance to sparse design, which is validated through finite sample simulation study. Finally, we employ the estimators for the return of some high frequency financial data.

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