Vergleich der Kreditrisikobewertung bei Berücksichtigung von Schätzunsicherheit und Korrelation – Welche Risikokomponente Sollten Unternehmen bei der Bewertung von Forderungsportfoliorisiken wann berücksichtigen?
Henry Dannenberg
Die Unternehmung Swiss Journal of Business Research and Practice,
2008
Abstract
The use of probability of default estimates to assess the risks of a credit portfolio should not ignore estimation uncertainty. The latter can be quantified by confidence intervals. But assumptions about dependencies of these intervals are inconsistent with assumptions of conventional credit portfolio models. Based on simulation studies this paper shows that a model which includes estimation uncertainty but ignores default correlation might estimate the real credit risk more correctly than a model that implicates default correlation but ignore estimation uncertainty. The latter is a trait of conventional credit portfolio models. In this paper quantifying of estimation uncertainty based on the idea of confidence intervals and the underlying probability distributions of these intervals.
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Das makroökonometrische Modell des IWH: Eine angebotsseitige Betrachtung
Rolf Scheufele
IWH Discussion Papers,
No. 9,
2008
Abstract
This paper describes the IWH macroeconometric model, a quarterly structural model for the German Economy. It focuses on the specification and estimation on supply-side aspects of the model. This approach guarantees a theoretical derived long-run model equilibrium. It combines short-run forecasting requirements with a long-run theoretical foundation. For some macroeconomic aggregates short- and long-run effects of supply- and demand shocks are illustrated. Additionally, effects of external shocks are investigated through model simulations to illustrate aggregate model characteristics.
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A note on GMM-estimation of probit models with endogenous regressors
Joachim Wilde
Statistical Papers,
No. 3,
2008
Abstract
Dagenais (1999) and Lucchetti (2002) have demonstrated that the naive GMM estimator of Grogger (1990) for the probit model with an endogenous regressor is not consistent. This paper completes their discussion by explaining the reason for the inconsistency and presenting a natural solution. Furthermore, the resulting GMM estimator is analyzed in a Monte-Carlo simulation and compared with alternative estimators.
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Kostenkalkulation unter Einbeziehung von Kosten der Risikotragung am Beispiel eines Bauunternehmens
Henry Dannenberg
Controller Magazin Bd. 32 (1),
No. 1,
2007
Abstract
Der Beitrag zeigt am Beispiel eines Bauunternehmens, wie die Kosten der Risikotragung bestimmt und in der Projektkalkulation berücksichtigt werden können. Hierfür wird für ein fiktives Bauunternehmen die Risikosituation analysiert und dargestellt, wie unter Verwendung einer Monte-Carlo-Simulation relevante Risikokennzahlen abgeleitet werden können.
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Schätzunsicherheit oder Korrelation, Welche Risikokomponente sollten Unternehmen bei der Bewertung von Kreditportfoliorisiken wann berücksichtigen?
Henry Dannenberg
IWH Discussion Papers,
No. 5,
2007
Abstract
The use of probability of default estimates to assess the risks of a credit portfolio should not ignore estimation uncertainty. The latter can be quantified by confidence intervals. But assumptions about dependencies of these intervals are inconsistent with assumptions of conventional credit portfolio models. Based on simulation studies this paper shows, that a model which include estimation uncertainty but ignore default correlation might estimate the real credit risk more correctly than a model that implicates default correlation but ignore estimation uncertainty. The latter is a trait of conventional credit portfolio models. In this paper quantifying of estimation uncertainty based on the idea of confidence intervals and the underlying probability distributions of these intervals.
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Die demographische Entwicklung in Ostdeutschland: Gutachten im Auftrag des Bundesministeriums für Wirtschaft und Technologie
Stefan Eichler, B. Grundig, C. Pohl, Lutz Schneider, M. Thum, Harald Lehmann, Joachim Ragnitz, Helmut Seitz
ifo Dresden Studien, Nr. 41,
No. 41,
2007
Abstract
In den neuen Bundesländern wird die Bevölkerung auch in den kommenden Jahren weiter massiv schrumpfen. Dieser absehbare Rückgang der Bevölkerung und die damit einhergehende Alterung kann die gesamtwirtschaftliche Dynamik dämpfen. Aus diesem Grund wurde im Auftrag des Bundeswirtschaftsministeriums eine Studie zu den Implikationen der demographischen Entwicklung in den neuen Bundesländern erarbeitet. Mit Blick auf den Arbeitsmarkt wurden mehrere Simulationsrechnungen bis zum Jahr 2020 durchgeführt, die zeigen, dass die zukünftige Arbeitsmarktsituation durch zwei gleichgerichtete Entwicklungen geprägt sein wird. Einerseits vermindert sich das Arbeitsangebot, andererseits führt die demographische Entwicklung auch zu einer Reduktion der Arbeitsnachfrage im Sektor nicht-handelbarer Güter. Wie sich der Arbeitsmarkt für die einzelnen Qualifikationsstufen entwickeln wird, hängt wesentlich von der Lohnentwicklung ab. Die relative Knappheit bei Hochqualifizierten dürfte auf Dauer zu Lohnsteigerungen führen, während bei anhaltender Arbeitslosigkeit in den übrigen Arbeitsmarktsegmenten kein Lohndruck nach oben entsteht.
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The Loss Distribution of the Entrepreneurial Bad Debt Risk – a Simulation-based Model
Henry Dannenberg
IWH Discussion Papers,
No. 10,
2006
Abstract
The risk of bad debt losses evolves for companies which grant payment targets. Possible losses have to be covered by these companies equity and liquidity reserves. The question of how to quantify the level of risk of bad debt losses will be discussed in this paper. Input values of this risk are the probability of default, exposure at default and loss given default. It is shown how companies can derive probability functions to describe uncertainty and variability for each input value. Based on these probability functions a simulation model is developed to quantify the risk of bad debt losses. Based on an empirical study probability functions for probability of default and loss given default are presented.
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Management von Mitarbeiterrisiken in Unternehmen
Henry Dannenberg
Risikomanagement im Unternehmen Praxisratgeber für die Einführung und Umsetzung, Kapitel 12-7,
2006
Abstract
The paper shows how to quantify the risk of loosing employees. Firstly, reasons will be determined that explain the loss of an employee. Dependent on these reasons, it is shown how to quantify the probability of losing an employee and possible losses that follow an employee loss. Based on these components of risks, a simulation based model is developed which aggregates the risk of all employees of a company to the distribution of the employees risk for the whole company. Finally, a tool for an easy calculating of this risk is presented.
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Determinants of employment - the macroeconomic view
Christian Dreger, Heinz P. Galler, Ulrich (eds) Walwai
Schriften des IWH,
No. 22,
2005
Abstract
The weak performance of the German labour market over the past years has led to a significant unemployment problem. Currently, on average 4.5 mio. people are without a job contract, and a large part of them are long-term unemployed. A longer period of unemployment reduces their employability and aggravates the problem of social exclusion.
The factors driving the evolution of employment have been recently discussed on the workshop Determinanten der Beschäftigung – die makroökonomische Sicht organized jointly by the IAB, Nuremberg, and the IWH, Halle. The present volume contains the papers and proceedings to the policy oriented workshop held in November 2004, 15-16th. The main focus of the contributions is twofold. First, macroeconomic conditions to stimulate output and employment are considered. Second, the impacts of the increasing tax wedge between labour costs and the take home pay are emphasized. In particular, the role of the contributions to the social security system is investigated.
In his introductory address, Ulrich Walwei (IAB) links the unemployment experience to the modest path of economic growth in Germany. In addition, the low employment intensity of GDP growth and the temporary standstill of the convergence process of the East German economy have contributed to the weak labour market performance. In his analysis, Gebhard Flaig (ifo Institute, München) stresses the importance of relative factor price developments. A higher rate of wage growth leads to a decrease of the employment intensity of production, and correspondingly to an increase of the threshold of employment. Christian Dreger (IWH) discusses the relevance of labour market institutions like employment protection legislation and the structure of the wage bargaining process on the labour market outcome. Compared to the current setting, policies should try to introduce more flexibility in labour markets to improve the employment record. The impact of interest rate shocks on production is examined by the paper of Boris Hofmann (Deutsche Bundesbank, Frankfurt). According to the empirical evidence, monetary policy cannot explain the modest economic performance in Germany. György Barabas and Roland Döhrn (RWI Essen) have simulated the effects of a world trade shock on output and employment. The relationships have been fairly stable over the past years, even in light of the increasing globalization. Income and employment effects of the German tax reform in 2000 are discussed by Peter Haan and Viktor Steiner (DIW Berlin). On the base of a microsimulation model, household gains are determined. Also, a positive relationship between wages and labour supply can be established. Michael Feil und Gerd Zika (IAB) have examined the employment effects of a reduction of the contribution rates to the social security system. To obtain robust results, the analysis is done under alternative financing scenarios and with different macroeconometric models. The impacts of allowances of social security contributions on the incentives to work are discussed by Wolfgang Meister and Wolfgang Ochel (ifo München). According to their study, willingness to work is expected to increase especially at the lower end of the income distribution. The implied loss of contributions could be financed by higher taxes.
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