Locally Adaptive Modeling of Unconditional Heteroskedasticity
Journal
The New England Journal of Statistics in Data Science
Type
journal article
Date Issued
2025-07-18
Author(s)
Abstract
We study local change point detection in variance using generalized likelihood ratio tests. Building on [24], we utilize the multiplier bootstrap to approximate the unknown, non-asymptotic distribution of the test statistic and introduce a multiplicative bias correction that improves upon the existing additive version. This proposed correction offers a clearer interpretation of the bootstrap estimators while significantly reducing computational costs. Simulation results demonstrate that our method performs comparably to the original approach. We apply it to the growth rates of U.S. inflation, industrial production, and Bitcoin returns.
Language
English (United States)
HSG Classification
None
Refereed
Yes
Publisher
New England Statistical Society
Subject(s)
Division(s)