Abstract
The quest of the mean change-point in ARCH models with innovations in the domain of attraction of a κ-stable law appears to still be ongoing. We derive the asymptotic distribution of the residuals CUSUM of squares test (RCUSQ) statistic and find it depends on the stable index κ which is often typically unknown and difficult to estimate. Therefore, the subsampling method is proposed to detect changes without estimating κ. The tests are easy to use and are found to perform well in a Monte Carlo experiment.
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