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: 10.1080/13675560412331298518

Abstract: The bullwhip effect is the observed amplification in order-size variance for upstream nodes in a supply chain. Lee et al. (1997, Management Science, 43, pp. 546–558) identified four causes for a single-product demand: (1) nodes updating their forecasts independently; (2) order batching; (3) price fluctuations; and (4) rationing. Chen et al. (2000, Management Science, 46, 436–443) provided a lower bound of the impact of the first cause. We contribute by quantifying the impact of the other three causes individually through simulation. We require any order to be an integer multiple of the batch size and posit price fluctuations and rationing as causing random i.i.d. errors or deviations from the optimal order size. We find with high R2 that the increase in order variance over a “core” order variance (when none of the four causes is present) is directly proportional to the square of the batch size and to the variance of the order deviations.

Export record: Citavi Endnote RIS ISI BibTeX WordXML

Copy reference link

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.

Export record: Citavi Endnote RIS ISI BibTeX WordXML

Copy reference link

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.

Export record: Citavi Endnote RIS ISI BibTeX WordXML

Copy reference link

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.

Export record: Citavi Endnote RIS ISI BibTeX WordXML

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.

Export record: Citavi Endnote RIS ISI BibTeX WordXML

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.

Export record: Citavi Endnote RIS ISI BibTeX WordXML

Copy reference link

Abstract: Focuses on use of operations research (OR) in internet-enabled supply chains of business enterprises. Benefits of using OR in planning, customer-relationship management, product design, and marketing; Impact of Internet growth on opportunities for OR; Improvement of supply-chain management of firms through OR.

Export record: Citavi Endnote RIS ISI BibTeX WordXML