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See detailTeacher's typology of student categories. A cluster analytic study
Hörstermann, Thomas UL; Krolak-Schwerdt, Sabine UL

Scientific Conference (2011, August)

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See detailA Comparison of the Constant-Order and Dual-Index Policy for Dual Sourcing
Klosterhalfen, Steffen UL; Kiesmüller, Gudrun; Minner, Stefan

in International Journal of Production Economics (2011), 133(1), 302-311

We analyze a single-product, periodic-review, stochastic demand inventory model with backorders and two supply options, a regular and a more expensive expedited one, with deterministic, offsetting lead ... [more ▼]

We analyze a single-product, periodic-review, stochastic demand inventory model with backorders and two supply options, a regular and a more expensive expedited one, with deterministic, offsetting lead times. Since the optimal policy for such a problem is generally unknown, several simpler policies have been proposed in the literature, e.g., the single-index (SIP), dual-index (DIP), or constant-order policy (COP). In previous research the DIP has been found to perform closely to the optimal policy in specific numerical settings. The COP, on the other hand, is very appealing from a practical point of view. We explore the relative cost performance of these two policies in a numerical study to gain insights into appropriate policy choices. We find that in settings, where dual sourcing is most valuable, the simpler COP delivers satisfactory results, sometimes even better ones than the DIP, and therefore represents a legitimate policy alternative for practical situations. [less ▲]

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See detailThe Hour of Europe: Western Powers and the Breakup of Yugoslavia
Glaurdic, Josip UL

Book published by Yale University Press (2011)

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See detailInvited talk - Leistungsbeurteilungen in der Schule
Krolak-Schwerdt, Sabine UL

Scientific Conference (2010, June)

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See detailReview Essay: ‘Confronting the Yugoslav Controversies: A Scholars’ Initiative,’ Charles Ingrao and Thomas A. Emmert (eds.)
Glaurdic, Josip UL

in East European Politics & Societies (2010), 24(2), 294-309316-320

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See detailSafety Stock Optimisation in Distribution Systems: A Comparison of Two Competing Approaches
Klosterhalfen, Steffen UL; Minner, Stefan

in International Journal of Logistics Research and Applications (2010), 13(2), 99-120

Contributions to multi-echelon safety stock optimisation can broadly be divided into models following either a stochastic- or guaranteed-service approach. These approaches form the basis of several ... [more ▼]

Contributions to multi-echelon safety stock optimisation can broadly be divided into models following either a stochastic- or guaranteed-service approach. These approaches form the basis of several commercial inventory optimisation software tools. To date, there is still a lack of a detailed comparison between the two approaches. This paper presents a cost comparison for two-stage distribution systems by means of a simulation study. The results indicate that the cost difference between the two approaches is quite small amounting to 4 at most. We observe that in most cases, the resulting (lower) internal warehouse service level is a good indicator for the superiority of an approach. The guaranteed-service approach shows a better performance for moderate flexibility costs, large warehouse processing times and high retailer service levels. [less ▲]

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See detailInside the Serbian war machine: The Milošević intercepts, 1991-1992
Glaurdic, Josip UL

in East European Politics & Societies (2009), 23(1), 86-104

This article examines the arguably most interesting pieces of evidence used during the trial of Slobodan Milošević at the International Criminal Tribunal for the former Yugoslavia—more than two hundred ... [more ▼]

This article examines the arguably most interesting pieces of evidence used during the trial of Slobodan Milošević at the International Criminal Tribunal for the former Yugoslavia—more than two hundred recordings of intercepted conversations that took place in 1991 and 1992 between Milošević, Radovan Karadžić, Dobrica Ćosić, and various other protagonists on the Serbian side of the wars in Croatia and Bosnia and Herzegovina (BiH). Analysis of the intercepts presented in this article makes several important contributions to the interpretation of events in former Yugoslavia during that period. First, it identifies the ideological foundations of Milošević-led Serbian war campaigns in the political influence of Dobrica Ćosić and his platform of “unification of Serbs.” Second, it contributes to the vigorous debate regarding the possible deal between Milošević and the Croatian president Franjo Tuđman for the division of BiH. It confirms that negotiations took place, but that Milošević and his associates had no intention of respecting any agreement and wanted the whole of BiH until at least late 1991. Third, it provides indications that Milošević held the position of the de facto commander-in-chief in the operations of the Yugoslav People's Army in Croatia and BiH. And fourth, it establishes that the two institutions of force Milošević had direct legal control over—Serbia's State Security Service and Ministry of Interior—were his principal means of control over Croatian and Bosnian Serbs and instruments in the aggression against BiH even after its international recognition. [less ▲]

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See detailFinanzintermediäre als Katalysatoren zwischen Markt und Recht – Compliance Verstöße zwischen Staatshaftung, öffentlich-rechtlicher Klagebefugnis und zivilrechtlichem Schutzgesetz
Zetzsche, Dirk Andreas UL

in Recht und Markt – Wechselbeziehungen zweier Ordnungen, Tagungsband zur 49. Assistententagung Öffentliches Recht in Bonn 2009 (2009)

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