Asymptotic results for time-changed Lévy processes sampled at hitting times
Asymptotic results for time-changed Lévy processes sampled at hitting times
复制标题
在命中时间采样的时变 Lévy 过程的渐近结果
DOI:
10.1016/j.spa.2011.03.013
复制
发表时间:
2011
影响因子:
1.4
通讯作者:
P. Tankov
中科院分区:
文献类型:
--
作者:
M. Rosenbaum;P. Tankov
We provide asymptotic results for time-changed Lévy processes sampled at random instants. The sampling times are given by the first hitting times of symmetric barriers, whose distance with respect to the starting point is equal to ε. For a wide class of Lévy processes, we introduce a renormalization depending on ε, under which the Lévy process converges in law to an α-stable process as ε goes to 0. The convergence is extended to moments of hitting times and overshoots. These results can be used to build high frequency statistical procedures. As examples, we construct consistent estimators of the time change and, in the case of the CGMY process, of the Blumenthal–Getoor index. Convergence rates and a central limit theorem for suitable functionals of the increments of the observed process are established under additional assumptions.
影响因子:
1.8
作者:
M. Fukasawa
通讯作者:
M. Fukasawa
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
Shimizu;Y.;清水泰隆;深澤正彰
通讯作者:
深澤正彰