Invited talk given, Statistische Woche 2026, Essen
I was one of the invited speakers at the Statistische Woche 2026, held at the University of Duisburg-Essen from 8 to 11 September 2026. In the session Statistical Theory and Methods, I presented Spectral Mean Estimators of Time Series: Finite Sample Distributional Approximations, joint work with Andreas Anastasiou and Efstathios Paparoditis.