EU Eastern Enlargement elicited a rise in (temporary) labour market oriented immi-gration to Germany starting in May 2011. Taking into account that not all immigrantsstay permanently and that outmigration flows are selective, this paper classifies recent EUimmigrants into 'new arrivals' and...

Several RCT studies have shown that prevention of type 2 diabetes is feasible via lifestyle interventions. Nevertheless, the empirical evidence for economic effectiveness of prevention in real-world settings is scarce. We analyze costs and effectiveness of a specific type 2 diabetes prevention...

Financial returns exhibit common behavior described at best by factor models, but also fat tails, which may be captured by α-stable distributions. This paper concentrates on estimating factor models with multivariate α-stable distributed and independent factors and idiosyncratic noises under...

Many experts claim that the incidence of suicide attacks is driven by religious cleavages. To test this hypothesis, we investigate whether the total number of suicide attacks per violent conflict or the annual number of suicide attacks per country is associated with simmering religious...

We provide new evidence on the role of economic policy uncertainty (EPU) in aggregate real economic activity in the US using a multiple-horizon Granger causality framework, while allowing for infrequent shifts in mean levels and growth rates of the system variables. Our empirical investigation...

In U.S. data 1981–2012, unsecured firm credit moves procyclically and tends to lead GDP, while secured firm credit is acyclical; similarly, shocks to unsecured firm credit explain a far larger fraction of output fluctuations than shocks to secured credit. In this paper we develop a tractable...

Despite the prevalence of both competitive forces and patterns of collaboration within academic communities, studies on research productivity generally treat universities as independent entities. By exploring the research productivity of all academic economists employed at 81 universities and 17...

This paper proposes a generational accounting approach to valuating research. Based on the flow of scientific results, a value-added (VA) index is developed that can, in principle, be used to assign a monetary value to any research result and, by aggregation, on entire academic disciplines or...

This paper investigates empirically the influence of government ideology on social policy using German data. Examining the funding and the benefits of social security and public healthcare policy, my results suggest that policies implemented by governments dominated by left- and rightwing...

This paper investigates empirically how unemployment-induced employment-breaks at different career stages influence pension benefits. The analysis is based on German data. I distinguish four different career phases and investigate to what extent the prevailing social security policy compensated...