Lena Mareen Körber

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Progenitor cells display interesting features for tissue repair and reconstruction. In the last years, such cells have been identified in different cartilage types. In this study, we isolated a migrative subpopulation of adult human nasoseptal chondrocytes with progenitor cell features by outgrowth from human nasal septum cartilage. These putative(More)
and the Verein for Sozial Politik for their helpful comments. The authors also thank Larry Christiano, Isabel Correira, and Pedro Teles for their helpful comments. Lena Körber gratefully acknowledges financial support from Cusanuswerk, the ESRC, and the Heinz-Nixdorf Foundation. The views expressed here are the authors' and not necessarily those of the(More)
Recent research has found that the dynamics of the New Keynesian model are very different when the nominal interest rate is zero. Positive technology shocks and negative shocks to the labor tax rate lower economic activity and the size of the government purchase multiplier can be as large as four. We consider the empirical relevance of these dynamics using(More)
This paper develops methodology for semiparametric panel data models in a setting where both the time series and the cross section are large. Such settings are common in finance and other areas of economics. Our model allows for heterogeneous nonparametric covariate effects as well as unobserved time and individual specific effects that may depend on the(More)
BACKGROUND The use of autologous auricular and rib cartilage for the reconstruction of nasal defects and deformities is associated with a number of disadvantages. The development of alternative materials is therefore the focus of intensive research. Recent studies demonstrated that decellularized cartilage is a promising material for cartilage tissue(More)
We measure asymmetries in the distribution of bond returns and exchange rates and test their statistical significance. Asymmetries are sizable when measured by the coefficient of skewness, a measure that is highly affected by outliers. In contrast, robustly measured asymmetries to outliers often disagree in sign or size, implying that much of the(More)
We investigate the effects of fragmentation in equity markets on the quality of trading outcomes in a panel of FTSE stocks over the period 2008-2011. This period coincided with a great deal of turbulence in the UK equity markets which had multiple causes that need to be controlled for. To achieve this, we use the common correlated effects estimator for(More)
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