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Analysis of profit contribution variance between actual and plan

Albers, Sönke - 1993

The traditional techniques of calculating quantity and price variances for analyzing deviations of realized profit contribution (actual) from the planned profit contribution only offer the benefit of identifying areas where problems may exist, rather than diagnosing the causes of these problems....

Persistent link: https://www.econbiz.de/10011594607

Experiments in competitive product positioning: An equilibrium analysis

Marks, Ulf G.; Albers, Sönke - 1995

Almost all of the results on competitive product positioning derived in respective literature so far are based fimdamentally on the hypothesis that Nash-equilibria are "accurate predictions" of final market configurations. If the positioning behavior of firms differs from this assumed...

Persistent link: https://www.econbiz.de/10011594610

Handelsvertreter oder Reisende? Eine Überprüfung von Hypothesen der neuen Institutionenlehre zur Absatzformwahl

Krafft, Manfred - 1995

In der jüngsten Vergangenheit wird der Effizienz und Effektivität von Funktionen, die von Unternehmen selbst wahrgenommen werden, erhöhte Aufmerksamkeit geschenkt. Während diese Diskussion bisher auf den Bereich der Beschaffung und Produktion beschränkt war, wird neuerdings im Rahmen von...

Persistent link: https://www.econbiz.de/10011594612

A guide to complexity theory in operations research

Schirmer, Andreas - 1995

inventive and persistent researchers, it seems virtually impossible to find efficient algorithms. In this Situation, the theory … instances attempted. In this work we develop the basic concepts of complexity theory. While doing so, we aim at presenting the … formal problem classes which are studied in complexity theory. …

Persistent link: https://www.econbiz.de/10011594617

New insights on the complexity of resource-constrained project scheduling: A case of single-mode scheduling

Schirmer, Andreas - 1996

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...

Persistent link: https://www.econbiz.de/10011594619

New insights on the complexity of resource-constrained project scheduling: Two cases of multi-mode scheduling

Schirmer, Andreas - 1996

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...

Persistent link: https://www.econbiz.de/10011594620

Lot sizing and scheduling with sequence dependent setup costs and times and efficient rescheduling opportunities

Haase, Knut; Kimms, Alf - 1996

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...

Persistent link: https://www.econbiz.de/10011594621

PSPLIB - a project scheduling problem library

Kolisch, Rainer; Sprecher, Arno - 1996

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...

Persistent link: https://www.econbiz.de/10011594623

Contracts as a barrier to entry in markets with non-pivotal buyers

Bedre-Defolie, Özlem; Biglaiser, Gary - 2016

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...

Persistent link: https://www.econbiz.de/10011595112

Gesamtwirtschaftliche Modelle in der Bundesrepublik Deutschland: Erfahrungen und Perspektiven

Heilemann, Ullrich (contributor); … - 1998

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...

Persistent link: https://www.econbiz.de/10011598587