Effects of Heterogeneity on Bank Efficiency Scores
J. W. B. Bos, Michael Koetter, James W. Kolari, Clemens J. M. Kool
European Journal of Operational Research,
Nr. 1,
2009
Abstract
Bank efficiency estimates often serve as a proxy of managerial skill since they quantify sub-optimal production choices. But such deviations can also be due to omitted systematic differences among banks. In this study, we examine the effects of heterogeneity on bank efficiency scores. We compare different specifications of a stochastic cost and alternative profit frontier model with a baseline specification. After conducting a specification test, we discuss heterogeneity effects on efficiency levels, ranks and the tails of the efficiency distribution. We find that heterogeneity controls influence both banks’ optimal costs and profits and their ability to be efficient. Differences in efficiency scores are important for more than only methodological reasons. First, different ways of accounting for heterogeneity result in estimates of foregone profits and additional costs that are significantly different from what we infer from our general specification. Second, banks are significantly re-ranked when their efficiency is estimated with a specification other than the preferred, general specification. Third, the general specification gives the most reliable estimates of the probability of distress, although differences to the other specifications are low.
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Are European Equity Style Indices Efficient? – An Empirical Quest in Three Essays
Marian Berneburg
Schriften des IWH,
Nr. 28,
2008
Abstract
Many situations in the history of the stock markets indicate that assets are not always efficiently priced. But why does it matter whether the stock market is efficiently priced? Because “well-functioning financial markets are a key factor to high economic growth”. (Mishkin and Eakins, 2006, pp. 3-4) In three essays, it is the aim of the author to shed some more light on the topic of market efficiency, which is far from being resolved. Since European equity markets have increased in importance globally, the author, instead of focusing on US markets, looks at a unified European equity market. By testing for a random walk in equity prices, revisiting Shiller’s claim of excess volatility through the means of a vector error correction model, and modifying the Gordon-Growth-Model, the book concludes that a small degree of inefficiency cannot be ruled out. While usually European equity markets are pricing assets correctly, some periods (e.g. the late 1990s and early 2000s) show clear signs of mispricing; the hypothesis of a world with two states (regime one, a normal efficient state, and regime two, a state in which markets are more momentum driven) presents a possible explanation.
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Industry Specialization, Diversity and the Efficiency of Regional Innovation Systems
Michael Fritsch, Viktor Slavtchev
Determinants of Innovative Behaviour,
2008
Abstract
Innovation processes are characterized by a pronounced division of labor between actors. Two types of externality may arise from such interactions. On the one hand, a close location of actors affiliated to the same industry may stimulate innovation (MAR externalities). On the other hand, new ideas may be born by the exchange of heterogeneous and complementary knowledge between actors, which belong to different industries (Jacobs’ externalities). We test the impact of both MAR as well as Jacobs’ externalities on innovative performance at the regional level. The results suggest an inverted u-shaped relationship between regional specialization in certain industries and innovative performance. Further key determinants of the regional innovative performance are private sector R&D and university-industry collaboration.
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How Does Industry Specialization Affect the Efficiency of Regional Innovation Systems?
Michael Fritsch, Viktor Slavtchev
Jena Economic Research Papers, Nr. 2008-058,
Nr. 58,
2008
Abstract
This study analyzes the relationship between the specialization of a region in certain industries and the efficiency of the region in generating new knowledge. The efficiency measure is constructed by relating regional R&D input and output. An inversely u-shaped relationship is found between regional specialization and R&D efficiency, indicating the presence of externalities of both Marshall and Jacobs’ type. Further factors influencing efficiency are spillovers within the private sector as well as from public research institutions. The impact of both the specialization and the additional factors is, however, different for regions at different efficiency levels.
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An Assessment of Bank Merger Success in Germany
Michael Koetter
German Economic Review,
Nr. 2,
2008
Abstract
German banks have experienced a merger wave since the early 1990s. However, the success of bank mergers remains a continuous matter of debate.This paper suggests a taxonomy to evaluate post-merger performance on the basis of cost and profit efficiency (CE and PE). I identify successful mergers as those that fulfill simultaneously two criteria. First, merged institutes must exhibit efficiency levels above the average of non-merging banks. Second, banks must exhibit efficiency changes between merger and evaluation year above efficiency changes of non-merging banks. I assess the post-merger performance up to 11 years after the mergers and relate it to the transfer of skills, the adequacy to merge distressed banks and the role of geographical distance. Roughly every second merger is a success in terms of either CE or PE. The margin of success in terms of CE is narrow, as efficiency differentials between merging and non-merging banks are around 1 and 2 percentage points. PE performance is slightly larger. More importantly, mergers boost in particular the change in PE, thus indicating persistent improvements of merging banks to improve the ability to generate profits.
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The Stability of Bank Efficiency Rankings when Risk Preferences and Objectives are Different
Michael Koetter
European Journal of Finance,
Nr. 2,
2008
Abstract
We analyze the stability of efficiency rankings of German universal banks between 1993 and 2004. First, we estimate traditional efficiency scores with stochastic cost and alternative profit frontier analysis. Then, we explicitly allow for different risk preferences and measure efficiency with a structural model based on utility maximization. Using the almost ideal demand system, we estimate input- and profit-demand functions to obtain proxies for expected return and risk. Efficiency is then measured in this risk-return space. Mean risk-return efficiency is somewhat higher than cost and considerably higher than profit efficiency (PE). More importantly, rank–order correlation between these measures are low or even negative. This suggests that best-practice institutes should not be identified on the basis of traditional efficiency measures alone. Apparently, low cost and/or PE may merely result from alternative yet efficiently chosen risk-return trade-offs.
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Effects of “Democratic Control” on the Efficiency of Local Public Enterprises: Empirical Evidence for Water Suppliers in Eastern Germany
Peter Haug
Public Finance and Management,
Nr. 1,
2008
Abstract
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The East German Cement Cartel: Cartel Efficiency and Policy after Economic Transformation
Ulrich Blum
Eastern Economic Review,
2007
Abstract
Im Jahr 2003 wurde von der deutschen Kartellbehörde ein Zementkartell aufgedeckt. Eines der Hauptzentren des Kartells war Ostdeutschland, wo das ostdeutsche Zementkombinat Anfang der 1990er Jahre von der Treuhand im Rahmen der Privatisierung der ehemals volkseigenen Betriebe an vier große Zementproduzenten verkauft wurden.
In diesem Aufsatz stellen wir die Behauptung der Kartellbehörde in Frage, dass durch das Kartell Überschussgewinne auf dem ostdeutschen Markt erziehlt wurden. Wir behaupten, dass die juristischen Anzeichen eines Kartells nicht zwangsläufig den wirtschaftlichen Hinweisen entsprechen. Zu diesem Zweck versuchen wir nachzuweisen, dass die Zementnachfrage regional begrenzt ist und nur in einem sehr kleinen Umfang von der Produktpalette abhängt. Wenn das Zementkartell einen Einfluss auf die Wirtschaft hatte, dann müsste sich seine Zerschlagung in der Veränderung der individuellen Nachfragefunktion der Unternehmen widerspiegeln. Allerdings konnten mit dem verwendeten ökonometrischen Modell keine strukturellen Nachfrageänderungen beobachtet werden. Dies kann unter anderem damit begründet werden, dass Billigimporte aus Polen und der Tschechei sowie mittelständische Unternehmen dafür gesorgt haben, dass das Zementkartell seine Wirkung nie voll entfalten konnte.
Der Aufsatz zeigt, dass selbst in etablierten Marktwirtschaften wie Westdeutschland die Schwierigkeit besteht, Wettbewerb in bestimmten Industriebereichen zu generieren und dass hierfür die Offenheit der Wirtschaft entscheidend ist.
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Requirements on Regulation Frameworks: What is the Best Way of Securing Efficiency in the Water Sector?
Peter Haug
Competition Policy in Network Industries, INFER Research Perspectives, Vol. 3,
2007
Abstract
Der Beitrag untersucht die Auswirkungen unterschiedlich gestalteter Regulierungssysteme auf die Effizienz der Wasserversorgung. Dazu werden zum einen diverse Anforderungen an effiziente Regulierungssysteme in modifizierter Form aus Studien zu anderen Netzwerkindustrien herangezogen. Zum anderen werden ergänzend weitere Bedingungen aus verschiedenen ökonomischen Theorien der Regulierung abgeleitet. Die Erfüllung der resultierenden Kriterien wird am Beispiel der Regulierungssysteme für die Wasserwirtschaft in den Niederlanden, Deutschland und den USA überprüft. Ein Vergleich unterschiedlicher Leistungskennzahlen für die drei Länder legt die Vermutung nahe, daß möglicherweise ein Zusammenhang zwischen der Gestaltung des Ordnungsrahmens der Regulierung und dem Preis-Qualitäts-Verhältnis im Trinkwasserbereich besteht.
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Systematic Mispricing in European Equity Prices?
Marian Berneburg
IWH Discussion Papers,
Nr. 6,
2007
Abstract
One empirical argument that has been around for some time and that clearly contra- dicts equity market efficiency is that market prices seem too volatile to be optimal estimates of the present value of future discounted cash flows. Based on this, it is deduced that systematic pricing errors occur in equity markets which hence can not be efficient in the Effcient Market Hypothesis sense. The paper tries to show that this so-called excess volatility is to a large extend the result of the underlying assumptions, which are being employed to estimate the present value of cash flows. Using monthly data for three investment style indices from an integrated European Equity market, all usual assumptions are dropped. This is achieved by employing the Gordon Growth Model and using an estimation process for the dividend growth rate that was suggested by Barsky and De Long. In extension to Barsky and De Long, the discount rate is not assumed at some arbitrary level, but it is estimated from the data. In this manner, the empirical results do not rely on the prerequisites of sta- tionary dividends, constant dividend growth rates as well as non-variable discount rates. It is shown that indeed volatility declines considerably, but is not eliminated. Furthermore, it can be seen that the resulting discount factors for the three in- vestment style indices can not be considered equal, which, on a risk-adjusted basis, indicates performance differences in the investment strategies and hence stands in contradiction to an efficient market. Finally, the estimated discount rates under- went a plausibility check, by comparing their general movement to a market based interest rate. Besides the most recent data, the estimated discount rates match the movements of market interest rates fairly well.
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