• Allocation of resources in the presence of indivisibilities : Scarf’s problem revisited 

      Bjørndal, Mette; Jörnsten, Kurt (Working Paper, Working paper, 2004-06)
      In his article “The Allocation of Resources in the Presence of Indivisibilities,” Scarf points out that the major problem presented to economic theory by the presence of indivisibilities is the impossibility of detecting ...
    • A maximum entropy approach to the newsvendor problem with partial information 

      Andersson, Jonas; Jörnsten, Kurt; Nonås, Sigrid Lise; Sandal, Leif Kristoffer; Ubøe, Jan (Discussion paper;2011:14, Working paper, 2011-08)
      In this paper, we consider the newsvendor model under partial information, i.e., where the demand distribution D is partly unknown. We focus on the classical case where the retailer only knows the expectation and variance ...
    • A maximum entropy approach to the newsvendor problem with partial information 

      Andersson, Jonas; Jörnsten, Kurt; Nonås, Sigrid Lise; Sandal, Leif Kristoffer; Ubøe, Jan (Journal article; Peer reviewed, 2013)
      In this paper, we consider the newsvendor model under partial information, i.e., where the demand distribution D is partly unknown. We focus on the classical case where the retailer only knows the expectation and variance ...
    • An analysis of a combinatorial auction 

      Bjørndal, Mette; Jörnsten, Kurt (Discussion paper, Working paper, 2001)
      Our objective is to find prices on individual items in a combinatorial auction that support the optimal allocation of bundles of items, i.e. the solution to the winner determination problem of the combinatorial auction. ...
    • An analysis of a combinatorial auction 

      Bjørndal, Mette; Jörnsten, Kurt (Working Paper, Working paper, 2001-05)
      Our objective is to find prices on individual items in a combinatorial auction that support the optimal allocation of bundles of items, i.e. the solution to the winner determination problem of the combinatorial auction. ...
    • An approach to salmon farming in Norway : a future for land based salmon farming? 

      Tvete, Anders (Master thesis, 2016)
      The aim of this thesis is to give an overview over the salmon farming industry in Norway. It presents some theory around production- and investment costs associated with land basedand sea based fish farming, as well as ...
    • A new Lagrangean Approach for the Travelling Salesman Problem 

      Jörnsten, Kurt; Kalcsics, Jörg (Discussion paper;04/15, Working paper, 2015-01-19)
      In this paper, we use a reformulation of the symmetric and the asymmetric travelling salesman problem more suitable for Lagrangean relaxation and analyse the new approach on examples from TSP Lib. Furthermore the Lagrangean ...
    • A New Semi-Lagrangean Relaxation for the K-Cardinality Assignment Problem 

      Belik, Ivan; Jörnsten, Kurt (Discussion paper;01/14, Working paper, 2014-01)
      Recently Beltrán-Royo, Vial & Alonso-Ayuso (2012) presented a semi-Lagrangean relaxation for the classical p-median location problem and for the incapacitated facility location problem. The results, obtained using the ...
    • A new Semi-Lagrangean Relaxation for the p-median problem 

      Butsch, Alex; Jörnsten, Kurt; Kalcsics, Jörg (Discussion paper;01/15, Working paper, 2015-01-09)
      Recently Beltran-Royo et.al presented a Semi-Lagrangean relaxation for the classical p-median location problem. The results obtained using the Semi-Lagrangean relaxation approach were quite impressive. In this paper we use ...
    • Assessment of the Norwegian transmission : pricing rules by using a modified AC-OPF 

      Stamtsis, Georgios C.; Bjørndal, Mette; Erlich, István; Jörnsten, Kurt (Working Paper, Working paper, 2004-06)
      This paper focuses on the combined effects of loss factors and zonal pricing in a system that takes as a starting point the procedures of transmission pricing in the Norwegian power system. It interprets the notion of loss ...
    • Assessment of the Norwegian transmission pricing rules by using a modified AC-OPF 

      Stamtsis, Georgios C.; Bjørndal, Mette; Erlich, István; Jörnsten, Kurt (Discussion paper, Working paper, 2004)
      This paper focuses on the combined effects of loss factors and zonal pricing in a system that takes as a starting point the procedures of transmission pricing in the Norwegian power system. It interprets the notion of loss ...
    • Centrality Computation in Weighted Networks Based on Edge-Splitting Procedure 

      Belik, Ivan; Jörnsten, Kurt (Discussion paper;40/14, Working paper, 2014-12)
      The analysis of network’s centralities has a high-level significance for many real-world applications. The variety of game and graph theoretical approaches has a paramount purpose to formalize a relative importance of ...
    • Common mistakes in computing the nucleolus 

      Guajardo, Mario; Jörnsten, Kurt (Discussion paper;15/14, Working paper, 2014-04)
      Despite linear programming and duality have correctly been incorporated in algorithms to compute the nucleolus, we have found mistakes in how these have been used in a broad range of applications. Overlooking the fact ...
    • Congestion management in the Nordic power market : counter purchases and zonal pricing 

      Bjørndal, Mette; Jörnsten, Kurt; Pignon, Virginie (Discussion paper, Working paper, 2002)
      In this paper, we investigate methods for managing congestion on the grid in the Nordic power market. Specifically, we have considered the differences between using counter purchases as opposed to pricing out the transmission ...
    • Cost allocation and pricing in a supply chain : an application for Aumann-Shapley prices 

      Bjørndal, Mette; Jörnsten, Kurt (Working paper, Working paper, 2004-11)
      We consider the problem of choosing among different distribution channels for combinations of different products, and how to price, or share the costs under the various alternatives, in an efficient and fair way. The problem ...
    • Cost allocation in collaborative forest transportation 

      Frisk, Mikael; Göthe-Lundgren, Maud; Jörnsten, Kurt; Rönnqvist, Mikael (Discussion paper, Working paper, 2006)
      Transportation planning is an important part of the wood flow chain in forestry. There are often several forest companies operating in the same region and co-ordination between two or more companies is rare. However, there ...
    • A disaggregated gravity model 

      Gitlesen, Jens Petter; Jörnsten, Kurt (Discussion paper, Working paper, 2000)
      The gravity model is used to estimate trip distributions. The estimates are in form of trip frequencies. This study is devoted to an entropy problem where the solution decomposes trip frequencies to the underlying probability ...
    • Efficient statistical equilibria in markets 

      Jörnsten, Kurt; Ubøe, Jan (Discussion paper, Working paper, 2005)
      In this paper we will study statistical equilibria in commodity markets where agents have a specified utility attached to every transaction in their offer sets. A probability measure on the product of all offer sets is ...
    • Equilibrium prices supported by dual price functions in markets with non-convexities 

      Bjørndal, Mette; Jörnsten, Kurt (Working Paper, Working paper, 2004-06)
      The issue of finding market clearing prices in markets with non-convexities has had a renewed interest due to the deregulation of the electricity sector. In the day-ahead electricity market, equilibrium prices are calculated ...
    • Internal pricing in supply chains 

      Fjell, Kenneth; Jörnsten, Kurt (Discussion paper, Working paper, 2001)
      A supply chain is two or more parties linked by a flow of goods, information and funds. Since this means that supply chain management concerns environments in which there are multiple decision makers, which may be different ...