Forecasting Currency Crises: Which Methods signaled the South African Crisis of June 2006?
Tobias Knedlik, Rolf Scheufele
South African Journal of Economics,
2008
Abstract
In this paper we test the ability of three of the most popular methods to forecast South African currency crises with a special emphasis on their out-of-sample performance. We choose the latest crisis of June 2006 to conduct an out-of-sample experiment. The results show that the signals approach was not able to forecast the out-of-sample crisis correctly; the probit approach was able
to predict the crisis but only with models, that were based on raw data. The Markov-regime- switching approach predicts the out-of-sample crisis well. However, the results are not straightforward. In-sample, the probit models performed remarkably well and were also able to detect, at least to some extent, out-of-sample currency crises before their occurrence. The recommendation is to not restrict the forecasting to only one approach.
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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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Grenzen des Wettbewerbs im Gesundheitswesen
Ingmar Kumpmann
Sozialer Fortschritt,
2008
Abstract
Many health economists demand more competition in the health-care system. They focus on the competition between the individual health-insurance funds for those who want such insurance as well as on the competition between health-care providers for contracts with the health-insurance funds. However, they neglect the competition between health-care providers for patients; such competition is crucial for medical quality. This latter area of competition is in conflict with the two former ones. The empirical evidence on the effects of competition on cost and quality are also ambiguous. Thus, the mere appeal for „more competition“ does not do justice to the highly complex nature of the health-care system.
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Koreferat zum Beitrag von Björn A. Kuchinke, Dirk Sauerland und Ansgar Wübker Bestimmungsgründe von Wartezeiten auf einen stationären Behandlungstermin: Ergebnisse einer aktuellen Umfrage
Ingmar Kumpmann
Gesundheitspolitische Rahmenbedingungen und ihre Wettbewerbswirkungen. DIBOGS-Beiträge zur Gesundheitsökonomie und Sozialpolitik Band 2,
2008
Abstract
Comment on an investigation about waiting times for inpatient treatment in German hospitals.
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Grenzen des Wettbewerbs im Gesundheitswesen
Ingmar Kumpmann
IWH Discussion Papers,
No. 1,
2008
Abstract
Many health economists demand more competition in the health care system. They focus on the competition between sickness funds for insured and the competition between health care providers for contracts with sickness funds. But they neglect the competition between health care providers for patients which is crucial for medical quality. This third field of competition is in conflict with the two former fields. The empirical evidence concerning the effects of competition on cost and quality is also ambiguous. Thus the mere claim for “more competition” does not do justice to the high complexity of the health care system.
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Does too much Transparency of Central Banks Prevent Agents from Using their Private Information Efficiently?
Axel Lindner
IWH Discussion Papers,
No. 16,
2007
Abstract
This paper analyses in a simple global games framework welfare effects of different communication strategies of a central bank: it can either publish no more than its overall assessment of the economy or be more transparent, giving detailed reasons for this assessment. The latter strategy is shown to be superior because it enables agents to use private information and to be less dependent on common knowledge. This result holds true even if the strategies of agents are strategic complements, for which case it has been argued that too much transparency might induce agents to neglect their private knowledge.
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Strategien der neuen Bundesländer im Rahmen der Gemeinschaftsaufgabe „Verbesserung der regionalen Wirtschaftsstruktur“ – Ein Vergleich –
Mirko Titze
IWH Discussion Papers,
No. 14,
2007
Abstract
The Common Task “Improvement of Regional Economic Structure” is one of the most important instruments for the “Reconstruction East”. Herein the federal states have an extensive flexibility to define their own kind of industrial policy. Due to their structural deficits this paper is focused on the federal states in East-Germany. A decrease in the budget constrains the governments to improve efficiency of subsidies. However, there is one way to solve this problem: change unselective government aid to regional as well as sectoral government aid. This paper shows that there is only one federal state, which has applied this kind of policy: the federal state of Brandenburg.
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Determinants of International Fragmentation of Production in the European Union
Götz Zeddies
IWH Discussion Papers,
No. 15,
2007
Abstract
The last decades were characterized by large increases in world trade, not only in absolute terms, but also in relation to world GDP. This was in large parts caused by increasing exchanges of parts and components between countries as a consequence of international fragmentation of production. Apparently, greater competition especially from the Newly Industrializing and Post-Communist Economies prompted firms in ‘high-wage’ countries to exploit international factor price differences in order to increase their international competitiveness. However, theory predicts that, beside factor price differences, vertical disintegration of production should be driven by a multitude of additional factors. Against this background, the present paper reveals empirical evidence on parts and components trade as an indicator for international fragmentation of production in the European Union. On the basis of a panel data approach, the main explanatory factors for international fragmentation of production are determined. The results show that, although their influence can not be neglected, factor price differences are only one out of many causes for shifting production to or sourcing components from foreign countries.
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A Simple Representation of the Bera-Jarque-Lee Test for Probit Models
Joachim Wilde
IWH Discussion Papers,
No. 13,
2007
Abstract
The inference in probit models relies on the assumption of normality. However, tests of this assumption are not implemented in standard econometric software. Therefore, the paper presents a simple representation of the Bera-Jarque-Lee test, that does not require any matrix algebra. Furthermore, the representation is used to compare the Bera-Jarque- Lee test with the RESET-type test proposed by Papke and Wooldridge (1996).
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Determinants of Female Migration – The Case of German NUTS 3 Regions
Alexander Kubis, Lutz Schneider
IWH Discussion Papers,
No. 12,
2007
Abstract
Our study examines the regional patterns and determinants of migration flows of young women. At the NUTS-3 regional level, i.e. the district level (Kreise), the German internal migration flows of the year 2005 are explored. From descriptive statistics it can be seen that peripheral regions in East Germany face the strongest migration deficit with respect to young women, whereas agglomerations in West Germany but also in the East benefit from an intense migration surplus within this group. An econometric analysis of determinants of regional migration flows gives evidence of the importance of labour market, family-related and educational migration motives. Generally speaking, young women tend to choose regions with good income and job opportunities, in addition they seem to be attracted by regions enabling an appropriate balance between family and career. Furthermore the existence of excellent educational facilities is a significant influence for young women’s migration. This educationally motivated type of migration generates a long lasting effect on the regional migration balance, especially when the educational opportunities in the destination region are associated with adequate career perspectives for high qualified female graduates. In view of considerable losses due to migration, the study shows various options for action. An important course of action is to incorporate policy measures improving regional employment and income opportunities. Secondly, extending vocational and academic offers addressed to women seems to be a suitable way to stimulate women’s immigration. Moreover, enhancing the social infrastructure, which contributes to a satisfactory work life balance, might attract young women or at least reduce the number of them leaving a region.
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