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Dynamic nonlinear panel models are estimated on the first 14 waves (waves A to N) of the German Socio-Economic Panel to test (among other things) for state dependence effects in male unemployment behaviour. Estimation of the models is based on the maximum likelihood approach. The best model turns out to be the dynamic probit model with equi-correlated disturbances where an individual"s unemployment probability at a given point in time depends on his labour force status in the previous period and which controlls for unobserved population heterogeneity. This model shows that there are strong and significant state dependence effects in individual unemployment as well as significant unobserved heterogeneity of the disturbances. This means, reducing unemployment today will have positive long-term effects on the labour market in the future

Die Erforschung komplexer Phänomene ist mittlerweile zu einem integralen Bestandteil der modernen Naturwissenschaften und insbesondere der nichtlinearen Physik geworden. Dieses neue Forschungsgebiet hält aber auch zunehmend Einzug in die Schulphysik. Es bietet interessante Themen und Inhaltsbereiche für den Unterricht, die einen Einstieg in die moderne Physik erlauben. Nichtlineare Phänomene wie z.B. das dynamische Verhalten chaotischer Pendel üben außerdem eine besondere Faszination aus. Es wird ein neues, universelles Chaospendel vorgestellt, das unterschiedliche Pendelarten (wie z.B. Überschlags-, Dreh- oder Magnetpendel) in sich vereint. Mit Hilfe dieses Pendels lassen sich vielfältige Experimente zur Chaosphysik realisieren, die sowohl elementare als auch äußerst differenzierte Wege in die Chaosphysik ermglichen.

In recent years non-linearities have gained increasing importance in economic and econometric research, particularly after the financial crisis and the economic downturn after 2007. This book contains theoretical, computational and empirical papers that incorporate non-linearities in econometric models and apply them to real economic problems. It intends to serve as an inspiration for researchers to take potential non-linearities in account. Researchers should be aware of applying linear model-types spuriously to problems which include non-linear features. It is indispensable to use the correct model type in order to avoid biased recommendations for economic policy.--