Schätzunsicherheit oder Korrelation, Welche Risikokomponente sollten Unternehmen bei der Bewertung von Kreditportfoliorisiken wann berücksichtigen?
Henry Dannenberg
IWH Discussion Papers,
No. 5,
2007
Abstract
Die Bewertung der Ausfallwahrscheinlichkeiten von Ratingklassen, basierend auf historischen Daten, ist mit Schätzunsicherheit verbunden. Zur Bewertung dieser Unsicherheit werden in der Literatur Konfidenzintervalle diskutiert. Diesen liegen allerdings Annahmen bezüglich der Abhängigkeiten zwischen einzelnen Forderungen zugrunde, die im Widerspruch zu den Annahmen der gängigen Kreditportfoliomodelle stehen. Im vorliegenden Beitrag wird anhand von Simulationsstudien gezeigt, dass eine Berücksichtigung von Schätzunsicherheit in kleinen Portfolios gerechtfertigt sein kann, auch wenn dafür Abhängigkeiten vernachlässigt werden müssen. Die Modellierung der Schätzunsicherheit beruht hier auf der Idee der Konfidenzintervalle und der ihnen zugrundeliegenden Verteilungen. Die Ergebnisse der Arbeit sind vor allem für die Modellierung von Forderungsportfolios in Unternehmen von Interesse.
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What Determines the Efficiency of Regional Innovation Systems?
Michael Fritsch, Viktor Slavtchev
Jena Economic Research Papers, Nr. 2007-006,
No. 6,
2007
Abstract
We assess the efficiency of regional innovation systems (RIS) in Germany by means of a knowledge production function. This function relates private sector research and development (R&D) activity in a region to the number of inventions that have been registered by residents of that region. Different measures and estimation approaches lead to rather similar assessments. We find that both spillovers within the private sector as well as from universities and other public research institutions have a positive effect on the efficiency of private sector R&D in the respective region. It is not the mere presence and size of public research institutions, but rather the intensity of interactions between private and public sector R&D that leads to high RIS efficiency. We find that relationship between the diversity of a regions’ industry structure and the efficiency of its innovation system is inversely u-shaped. Regions dominated by large establishments tend to be less efficient than regions with a lower average establishment size.
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Universities and Innovation in Space
Michael Fritsch, Viktor Slavtchev
Industry and Innovation,
No. 2,
2007
Abstract
We investigate the role of universities as a knowledge source for regional innovation processes. The contribution of universities is tested on the level of German NUTS‐3 regions (Kreise) by using a variety of indicators. We find that the intensity and quality of the research conducted by the universities have a significant effect on regional innovative output while pure size is unimportant. Therefore, a policy that wants to promote regional innovation processes by building up universities should place substantial emphasis on the intensity and quality of the research conducted there. We also find the effects of universities to be concentrated in space. Obviously, the geographical proximity to particular knowledge sources is important for regional innovative activities.
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Local Government Control and Efficiency of the Water Industry: An Empirical Analysis of Water Suppliers in East Germany
Peter Haug
IWH Discussion Papers,
No. 3,
2007
Abstract
The paper deals with the effects of local governments’ interference with business affairs of publicly owned utilities. A partial model is presented to illustrate the consequences of “democratic control” for the public managers’ effort and the efficiency of local public production. To check the theoretical results empirically, a two-stage data envelopment analysis (DEA) is carried out for a sample of East German water suppliers. The organisational form is used as a measure for the degree of municipal control. The results of the OLS- and Tobit regression indicate an efficiency-enhancing effect of organisational forms with less distinctive control options for local politicians.
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Kann ökonomische Freiheit durch Entwicklungshilfe forciert werden? Eine empirische Analyse
Tobias Knedlik, Franz Kronthaler
Berichte aus dem Weltwirtschaftlichen Colloquium der Universität Bremen, Nr. 102,
2006
Abstract
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Förderung von Forschung und Entwicklung bei Wachstumsträgern in benachteiligten Regionen
Dominik Weiß, V. Lo, B. Wolf, K. Koschatzky
Evaluation des BMWi-Programms INNO-WATT,
2006
Abstract
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Wettbewerbspolitik
Ulrich Blum
Handbuch für evolutorische Ökonomik,
2011
Abstract
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Risikoorientierte Prämiendifferenzierung in der Kfz-Haftpflichtversicherung: mehr Prämiengerechtigkeit und weniger Verkehrsunfälle?
Christian Growitsch, K.-D. Schade, R. Schwarze, H.-P. Schwintowski, Thomas Wein
Zeitschrift für die gesamte Versicherungswissenschaft,
2006
Abstract
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Institutions and Cluster
Ulrich Blum
Handbook on Research on Clusters,
2007
Abstract
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A macroeconometric model for the Euro economy
Christian Dreger, Massimiliano Marcellino
Externe Publikationen,
No. 29,
2007
Abstract
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