Maximum likelihood estimation for multiscale Ornstein-Uhlenbeck processes
Maximum likelihood estimation for multiscale Ornstein-Uhlenbeck processes
复制标题
多尺度 Ornstein-Uhlenbeck 过程的最大似然估计
DOI:
10.1080/17442508.2018.1424853
复制
发表时间:
2018
期刊:
影响因子:
0.9
通讯作者:
Zhang F
中科院分区:
文献类型:
--
作者:
Zhang F
We study the problem of estimating the parameters of an Ornstein–Uhlenbeck (OU) process that is the coarse-grained limit of a multiscale system of OU processes, given data from the multiscale system. We consider both the averaging and homogenization cases and both drift and diffusion coefficients. By restricting ourselves to the OU system, we are able to substantially improve the results with strong modes of convergence, and provide some intuition of what to expect in the general case. In particular, in the homogenisation case we derive optimal rates of sub-sampling to minimize the estimation errors.