Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
On non-standard limits of Brownian semi-stationary processes. / Gärtner, Kerstin; Podolskij, Mark.
In: Stochastic Processes and Their Applications, Vol. 125, No. 2, 2015, p. 653-677.Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
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TY - JOUR
T1 - On non-standard limits of Brownian semi-stationary processes
AU - Gärtner, Kerstin
AU - Podolskij, Mark
PY - 2015
Y1 - 2015
N2 - In this paper we present some new asymptotic results for high frequency statistics of Brownian semi-stationary processes. More precisely, we will show that singularities in the weight function, which is one of the ingredients of a BSS process, may lead to non-standard limits of the realised quadratic variation. In this case the limiting process is a convex combination of shifted integrals of the intermittency function. Furthermore, we will demonstrate the corresponding stable central limit theorem. Finally, we apply the probabilistic theory to study the asymptotic properties of the realised ratio statistics, which estimates the smoothness parameter of a BSS process.
AB - In this paper we present some new asymptotic results for high frequency statistics of Brownian semi-stationary processes. More precisely, we will show that singularities in the weight function, which is one of the ingredients of a BSS process, may lead to non-standard limits of the realised quadratic variation. In this case the limiting process is a convex combination of shifted integrals of the intermittency function. Furthermore, we will demonstrate the corresponding stable central limit theorem. Finally, we apply the probabilistic theory to study the asymptotic properties of the realised ratio statistics, which estimates the smoothness parameter of a BSS process.
KW - math.PR
KW - 60F05, 60F15, 60F17
U2 - 10.1016/j.spa.2014.09.019
DO - 10.1016/j.spa.2014.09.019
M3 - Journal article
VL - 125
SP - 653
EP - 677
JO - Stochastic Processes and Their Applications
JF - Stochastic Processes and Their Applications
SN - 0304-4149
IS - 2
ER -