The KLU faculty, post-docs, and PhD candidates regularly publish the results of their research in scientific journals. You will find a complete overview of all KLU publications below (e.g. articles in peer-reviewed journals, professional journals, books, working papers, and conference proceedings). Search for relevant terms and keywords, or filter the list by name, year of publication or type of publication. The references include DOIs and abstracts where available, and you can download them to your own reference database or platform. We regularly update the database with new publications.

Journal Articles (Peer-Reviewed)

Copy reference link   DOI: 10.1023/A:1018346332447

Abstract: Using 1992 data of 1490 banks covering about 40% of German banking, we specify amulti-product translog cost function and follow the “thick frontier”-approach to control for cost inefficiency when evaluating the technology of banking. Scale economies are found to exist up to a size of about 5 billion DM of total assets, with diseconomies being caused by non-operating costs. There is hardly any evidence of economies of scope. Compared to cost inefficiency external factors play a surprisingly strong role in explaining cost differences between high-cost and low-cost banks. Smaller banks turn out to be more responsive to input prices.

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Copy reference link   DOI: 10.1016/S0167-8116(97)00038-4

Abstract: Marketing controllers traditionally analyze the profit contribution variance between actual and plan by decomposing it into a quantity and a price variance. This, however, enables them only to identify areas where problems exist rather than to diagnose their causes. In order to get more insights, this paper proposes making the planning assumptions for achieving a certain profit contribution explicit beforehand by specifying appropriate response functions. This information can be used after the fact to calculate the amount of profit contribution variance associated with different sources. In particular, the paper offers a novel decomposition principle of total variance into partial variances associated with possible sources such as incorrect market response assumptions (planning variance), deviations of actual marketing actions from planned ones (execution variance) and misanticipation of competitive reactions (reaction variance). Each of these variances can be decomposed further into the separate effects of single marketing instruments. By distinguishing between a response function for market share and one for market size, controllers can also estimate for which part of the variance the product manager may be responsible.

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Copy reference link   DOI: 10.2307/20714861

Abstract: This article applies a modern empirical test of conduct to assess competitive conditions in the German banking sector. The elasticity of total revenues with respect to changes in input prices is calculated, using the intermediation approach as model of the banking firm. The functional form of the revenue equation is specified as a Translog function. The empirical basis consists of a panel of 1432 German universal banks with an observation period of at least four years for each of them. To account for potential consequences of the distinct regulatory environment and average bank size, the estimations are run separately for the three subgroups „cooperative banks”, „savings banks” and „credit banks”. The empirical results are consistent with the behavior of monopolistic competition, rejecting significantly the hypotheses of both monopoly and perfect competition. Differences between the subgroups turned out to be small, rejecting a causality from market share on market behavior.

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Copy reference link   DOI: http://dx.doi.org/10.1016/0378-4266(95)00040-2

Abstract: Using 1989–1992 individual data of 757 German cooperative banks and applying the intermediation approach we specify a multi-product translog cost function for this part of the German banking industry. For all size classes moderate economies of scale can be identified. There is also evidence of economies of scope which supports the notion of universal banking. As for cost efficiency, we find that the average banks in all size classes deviate considerably from the best practice cost frontier. All banks enjoy growth of total factor productivity, which is higher for the smaller banks in the sample.

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Abstract: Im Mittelpunkt dieser Studie steht die Fragestellung, in welchem Ausmaß Gewinnunterschiede und Marktanteilsveränderungen auf Effizienzunterschiede zwischen den Unternehmen zurückzuführen sind. Hierzu wird in einem ersten Schritt mit Hilfe des Fixed-Effects- sowie des Stochastic-Frontier-Ansatzes die unternehmensspezifische Kosteneffizienz bestimmt. In einem zweiten Schritt wird dann der Zusammenhang zwischen Kosteneffizienz einerseits und den Marktergebnisvariablen Profitabilität sowie Marktanteilsveränderung andererseits untersucht. Dieser Zusammenhang ist um so enger, je wettbewerblicher das Unternhemnsverhalten ist. Für den deutschen Bankensektor, repräsentiert durch Paneldaten von 1425 deutschen Universalbanken, deuten die Berechnungen auf sigifikante Unterschiede zwischen den Bankengruppen hin. Während die Gewinne von Genossenschaftsinstituten relativ stark von der Kosteneffizienz beeinflußt werden, ist dies bei Sparkassen sowie Kreditbanken kaum der Fall. Untersucht man dagegen die Beziehung zwischen Marktanteilsentwicklung und Effizienz, dann ist der Erklärungsgehalt für den Sparkassensektor größer als für die beiden anderen Bankengruppen.

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Abstract: I developed a simplified version of a decision support system for Health Net. Health Net needed a system to manage fixed-income portfolios worth $370 million and to analyze 36 different types of fixed-income securities and derivatives for risk and return. I integrated the required mathematical models and database system in the object-oriented paradigm by uniformly implementing mathematical models for interest rate movements and cash flows of securities, database entities, and the interface as interacting objects. [ABSTRACT FROM AUTHOR]Copyright of Interfaces is the property of INFORMS: Institute for Operations Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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