Stein estimation for the drift of Gaussian processes using the Malliavin calculus
Stein estimation for the drift of Gaussian processes using the Malliavin calculus
复制标题
DOI:
10.1214/07-aos540
复制
发表时间:
2008-10
影响因子:
4.5
通讯作者:
Nicolas Privault;Anthony R'eveillac
中科院分区:
文献类型:
--
作者:
Nicolas Privault;Anthony R'eveillac
We consider the nonparametric functional estimation of the drift of a Gaussian process via minimax and Bayes estimators. In this context, we construct superefficient estimators of Stein type for such drifts using the Malliavin integration by parts formula and superharmonic functionals on Gaussian space. Our results are illustrated by numerical simulations and extend the construction of James-Stein type estimators for Gaussian processes by Berger and Wolpert [J. Multivariate Anal. 13 (1983) 401-424].