In diesem Beitrag wird die regionale Ausbreitung von COVID-19-Infektionen untersucht. Unter Verwendung der Hauptkomponentenanalyse, des LARS- und RLASSO-Auswahlverfahrens erfolgt eine Variablenreduktion. Geprüft wird die Bedeutung von Zustandsabhängigkeit, unbeobachteter Heterogenität und...

This paper presents a survey on panel data methods in which Iemphasize new developments. Inparticular, linear multilevel models with a new variant are discussed. Furthermore, non-linear, nonparametric and semiparametric models are analyzed. In contrast to linear models there do not exist unified...

This paper analyses cyclical effects on job-to-job mobility using German data. The focus lies on the influence of the regional unemployment rate and the regional growth of the GDP. Job-to-job transitions are fragmented into external and internal movements. The innovation is to describe mobility...

This paper presents a survey on recent developments in estimation methods, instrumental variables approaches, panel data models, non- and semiparametric models for micro data. Additionally, some tests in these areas are considered. Special attention is paid to problems with weak instruments,...