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: 10.1504/IJATM.2004.006288

Abstract: The role of Information Technology (IT) as a source of competitive advantage and enabler of advanced supply chain management in inter-organisational systems is hardly in question. E-commerce, trade-exchanges and online transactions are just a few of these enabling features. The thrust and volume of studies reflect this critical role, yet recent research reflects more qualitative and case-based research designs. This is in part due to the intangible nature of IT systems, and the resulting difficulties of visualisation and quantification. This paper reviews the main research methods in IT, based on the lessons learnt from a three-year research programme in the automotive industry, and concludes with a generic framework on how both qualitative and quantitative methods can be integrated to provide a more holistic understanding of IT in inter-organisational systems.

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Abstract: Die Krise der Medienindustrie ist im wesentlichen eine Krise des Werbemarktes. Angesichts eines Beitrages der Werbung in Höhe von zwei Dritteln zum Umsatzaufkommen der Massenmedien überrascht dies nicht,wird aber durch das vorliegende Zahlenmaterial noch einmal bestätigt. Dieser Beitrag geht der Frage nach, ob der beobachtete Einbruch die historischen Zyklen der Werbebranche bestätigt, oder ob ein Strukturbruch und damit ein Zerfall der bisherigen Zyklusmuster stattgefunden hat. Hierzu werden in einem ersten Schritt mit Hilfe der Spektralanalyse die in der Vergangenheit dominierenden Zyklen identifiziert. Als Datenmaterial stehen die Werbeausgaben von 1960 bis 2003 auf Jahresbasis zur Verfügung, wobei die Werbeausgaben nach vier Mediengattungen differenziert sind. In einem zweiten Schritt werden die identifizierten Zyklen als erklärende Variable in ein Regressionsmodell eingefügt, um deren Erklärungsbeitrag zu den historisch beobachteten Veränderungsraten des Werbemarktes zu bestimmen. Es zeigt sich, dass die beobachteten Veränderungsraten relativ gut durch das gemessene Zyklusgefüge mit sich überlagernden Einzelzyklen erklärt werden kann. Der Test auf Strukturbruch wird verworfen – zumindest bislang kann somit davon ausgegangen werden, dass die Krise des Werbemarktes das historische Zyklusmuster eher bestätigt als zerstört.

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Abstract: We present a general modeling approach to crew rostering and its application to computer-assisted generation of rotation-based rosters (or rotas) at the London Underground. Our goals were flexibility, speed, and optimality, and our approach is unique in that it achieves all three. Flexibility was important because requirements at the Underground are evolving and because specialized approaches in the literature did not meet our flexibility-implied need to use standard solvers. We decompose crew rostering into stages that can each be solved with a standard commercial MILP solver. Using a 167 MHz Sun UltraSparc 1 and CPLEX 4.0 MILP solver, we obtained high-quality rosters in runtimes ranging from a few seconds to a few minutes within 2% of optimality. Input data were takes from different depots with crew sizes ranging from 30–150 drivers, i.e., with number of duties ranging from about 200–1000. Using an argument based on decomposition and aggregation, we prove the optimality of our approach for the overall crew rostering problem.

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Copy reference link   DOI: http://dx.doi.org/10.1016/S1042-444X(03)00018-5

Abstract: Contagion tests that are based on the correlation coefficient assume constant correlations and symmetric impacts of shocks. Moreover, they neglect volatility as a potential factor of contagion. We show that such tests can be misleading when correlations are time-varying and volatility is contagious per se. We propose a new test that is based on a regression model that eliminates the shortcomings of these tests and differentiates between mean contagion and volatility contagion in an asymmetric way. Empirical results for 11 Asian stock markets show that there is mean and volatility contagion in the Asian crisis.

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Abstract: Any company that has a global supply chain should consider introducing its strategic left hand to its operational right hand. Senior managers formulate strategy to maximize shareholder value; supply-chain planners run optimization models to minimize costs. Consider a strategic supply-chain planning exercise at a polyvinyl chloride (PVC) manufacturer that we will call Acme Vinyl Co. Acme's North American revenues came from PVC for building (55%), packaging (15%), consumer goods (10%), the electronic industry (10%), the automotive industry (4%) and from non-PVC products (6%). Although business-strategy formulation also uses tools and flame-works, it requires much more creativity than tactical planning. For tactical supply-chain planning, the decision options and the factors affecting them (production capacity, distribution capacity, variable costs, demand forecast) are clearly defined. Optimization models for tactical supply-chain planning and models for strategic supply-chain planning differ only slightly in their design, but markedly in their use. In scenario planning, senior managers build internally consistent, alternative views of possible future outcomes.

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Abstract: Die Selbstsegmentierung legt die Segmentierung und zum Teil auch die Zusammenstellung der Value Propositon in die Hände der Kunden. Sie ist eine Weiterentwicklung des Mass-Customisation-Konzepts und des Co-Opting-Costumer-Competence-Gedankens.

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Copy reference link   DOI: http://dx.doi.org/10.1016/S0922-1425(02)00016-6

Abstract: The paper analyses the causality between the Japanese prices and the yen–dollar exchange rate. It explains the long-term appreciation trend of the Japanese yen and why the Japanese yen proved strong even during the economic slump of the 1990s. The paper suggests that the appreciation of the Japanese yen forced the Japanese enterprises into price reductions and productivity increases, which put a floor under the high level of the yen and, thus, initiated rounds of appreciation. This corresponds to the conjecture of a vicious (virtuous) circle of appreciation and price adaptation. Further, there is evidence that the yen-appreciation has been accommodated by the Bank of Japan’s monetary policy. This corresponds to the conjecture that the recent Japanese deflation is imposed from outside via the exchange rate.

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