Complexity proofs often restrict themselves to stating that the problem at hand is a generalization of some other intractable problem, This proof technique relies on the widely accepted assumptions that complexity results hold regardless of the model formulation used to represent the problem and...

NP-completeness and other complexity proofs often merely State that the problem at hand is a generalization of some other intractable problem. This proof technique relies on the widely accepted assumption that complexity results hold regardless of the model formulation used to represent the...

This paper deals with lot sizing and scheduling for a single-stage production System where setup costs and times are sequence dependent. A large bücket mixed integer programming (MIP) model is formulated which considers only efficient sequences. A tailor-made enumeration method of the...

We present a set of benchmark instances for the evaluation of Solution procedures for single- and multi-mode resource-constrained project scheduling problems. The instances have been systematically generated by the Standard project generator ProGen. They are characterized by the input-parameters...

Considering markets with non-pivotal buyers we analyze the anti-competitive effects of breakup fees used by an incumbent facing a more efficient entrant in the future. Buyers differ in their intrinsic switching costs. Breakup fees are profitably used to foreclose entry, regardless of the...

Makroökonometrische Modelle sind in Deutschland aus der kurzfristigen Wirtschaftsprognose und der Prozeßanalyse nicht mehr wegzudenken. Die Entwicklung dahin war zwar auch von Verlangsamungen und Unterbrechungen begleitet - die generelle Disreputation der Makroökonomie in den siebziger...

Die Strategiegenese in kleinen und mittleren Unternehmen (KMU) ist durch eine Konzentration auf die jeweilige Situation und durch eine hohe Dynamik gekennzeichnet. Wichtige Entscheidungen werden spontan und auf den ersten Blick "unüberlegt" gefällt, Strategien sind offensichtlich selbst auf...