Stefan Schubert

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Two hundred and twenty-five healthy German volunteers traveling to 53 different countries (mostly in Asia, Africa and South America) were enrolled in a prospective cohort study. Stool samples and data on potential travel-associated risk factors (such as type of travel, nutritional habits, occurrence of gastroenteritis) were collected before and after(More)
The paper analyzes the dynamic effects of a total factor productivity shock and an interest rate risk premium shock in a highly indebted open economy. In contrast to the standard open economy framework, search unemployment and wage bargaining are introduced. We find that a negative total factor productivity shock primarily has effects on the economy’s(More)
Since the spring of 2009, there have been a considerable number of infected as well as fatal cases by virologically confirmed swine-origin H1N1 influenza A virus (S-OIV). The virus continues to spread globally. The World Health Organization (WHO) has now raised the level of S-OIV influenza pandemic alert to phase 6 (‘the pandemic phase’) because of the(More)
The recent empirical literature on the economic effects of terms of trade shocks highlights not only the direct effects on growth, but also the resulting changes in volatility and debt. We link the procyclicality of sovereign debt to terms of trade shocks and provide theoretical underpinnings for standby facilities such as the “Exogenous Shocks Facility”(More)
Human alveolar echinococcosis (AE) is a potentially deadly disease; recent studies have shown that the endemic area of Echinococcus multilocularis, its causative agent, is larger than previously known. This disease has low prevalence and remains underreported in Europe. Emerging clinical data show that diagnostic difficulties are still common. We report on(More)
We demonstrate a monolithically integrated quadrature coherent receiver photonic integrated circuit on an InP substrate with a 90° optical hybrid and two balanced 56 GHz pin-photodetectors on chip level and as a packaged device. The presented devices enable the use of 56/64 Gbaud dual polarisation 16-QAM signals either in the C-band or the L-band.
The CD4 count is the best surrogate marker for monitoring HIV. The reference method for assessing CD4 counts (flow cytometry, FCM), as expensive technique, is not widely used in non-OECD countries. To make HIV-monitoring available to more patients in these countries, we modified a commercially available density-based negative selection assay (RosetteSep) to(More)