The paper investigates asymptotically efficient inference in general likelihood models with time varying parameters. Parameter path estimators and tests of parameter constancy are evaluated by their weighted average risk and weighted average power, respectively. The weight function is...

The paper considers time series GMM models where a subset of the parameters are time varying. The magnitude of the time variation in the unstable parameters is such that efficient tests detect the instability with (possibly high) probability smaller than one, even in the limit. We show that for...

The paper studies the asymptotic efficiency and robustness of hypothesis tests when models of interest are defined in terms of a weak convergence property. The null and local alternatives induce different limiting distributions for a random element, and a test is considered robust if it controls...

Die durch das SARS-CoV-2 Virus verursachte COVID-19-Pandemie hat erhebliche Mängel bei der Erfassung und Dokumentation des Sterblichkeitsgeschehens in Deutschland offenbart. Die bestehenden Mängel schaden kurz- und langfristig dem Schutz der in Deutschland lebenden Menschen nicht nur gegen...

There has been a growing number of theoretical as well as experimental investigations on the emergence of evolutionarily stable cooperative strategies in the iterated Prisoner's Dilemma game. From a methodological viewpoint, investigations of this sort suffer so far from two shortcomings. The...

The paper studies the asymptotic efficiency and robustness of hypothesis tests when models of interest are defined in terms of a weak convergence property. The null and local alternatives induce different limiting distributions for a random element, and a test is considered robust if it controls...

The paper considers time series GMM models where a subset of the parameters are time varying. The magnitude of the time variation in the unstable parameters is such that efficient tests detect the instability with (possibly high) probability smaller than one, even in the limit. We show that for...