Bayesian sequential least-squares estimation for the drift of a Wiener process
Bayesian sequential least-squares estimation for the drift of a Wiener process
复制标题
维纳过程漂移的贝叶斯顺序最小二乘估计
DOI:
10.1016/j.spa.2019.09.006
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发表时间:
2022
影响因子:
1.4
通讯作者:
Vaicenavicius, Juozas
中科院分区:
文献类型:
--
作者:
Ekström, Erik;Karatzas, Ioannis;Vaicenavicius, Juozas
Given a Wiener process with unknown and unobservable drift, we try to estimate this drift as effectively but also as quickly as possible, in the presence of a quadratic penalty for the estimation error and of a fixed, positive cost per unit of observation time. In a Bayesian framework, where the unobservable drift is assumed to have a known “prior” distribution, this question reduces to choosing judiciously a stopping time for an appropriate diffusion process in natural scale. We establish structural properties of the solution for the corresponding problem of optimal stopping. In particular, we show that, regardless of the prior distribution, the continuation region is monotonically shrinking in time. Moreover, we provide conditions on the prior distribution that guarantee a one-sided stopping region. Lastly, some concrete prior distributions are studied to illustrate the theoretical results.
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Umut Çetiṅ;Alexander Novikov;A. Shiryaev
通讯作者:
A. Shiryaev
DOI:
10.1137/15m1033265
发表时间:
2015-09
期刊:
SIAM J. Financial Math.
影响因子:
--
作者:
Erik Ekström;Juozas Vaicenavicius
通讯作者:
Erik Ekström;Juozas Vaicenavicius
DOI:
--
发表时间:
1953
期刊:
影响因子:
--
作者:
D. Widder
通讯作者:
D. Widder