Blar i Articles (FOR) på forfatter "Sandal, Leif Kristoffer"

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    • A bridge between continuous and discrete-time bioeconomic models: Seasonality in fisheries 

      Kvamsdal, Sturla F; Maroto, Jose M.; Moran, Manuel; Sandal, Leif Kristoffer (Journal article; Peer reviewed, 2017)
      We develop a discretization method to construct a discrete finite-time bioeconomic model, corresponding to bioeconomic models with continuous-time growth function, but allowing the analysis of seasonality in fisheries. The ...

    • 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 maintenance schedules for public facilities 

      Hopland, Arnt Ove; Kvamsdal, Sturla F; Sandal, Leif Kristoffer (Journal article; Peer reviewed, 2019)
      We present a flexible, formal framework for maintenance scheduling for public facilities. Key features of the model include an accelerating deterioration scheme, a general utility measure, and real estate market effects ...

    • Harvest control rules in modern fisheries management 

      Kvamsdal, Sturla F; Eide, Arne; Ekerhovd, Nils-Arne; Enberg, Katja; Gudmundsdottir, Asta; Hoel, Alf Håkon; Mills, Katherine E.; Mueter, Franz J.; Ravn-Jonsen, Lars; Sandal, Leif Kristoffer; Stiansen, Jan Erik; Vestergaard, Niels (Journal article; Peer reviewed, 2016)
      Harvest control rules have become an important tool in modern fisheries management, and are increasingly adopted to provide continuity in management practices, to deal with uncertainty and ecosystem considerations, and to ...

    • Harvesting in a Fishery with Stochastic Growth and a Mean-Reverting Price 

      Kvamsdal, Sturla F; Poudel, Diwakar; Sandal, Leif Kristoffer (Journal article; Peer reviewed, 2014)
      We analyze a continuous, nonlinear bioeconomic model to demonstrate how stochasticity in the growth of fish stocks affects the optimal exploitation policy when prices are stochastic, mean-reverting and possibly harvest ...

    • Stackelberg equilibria in continuous newsvendor models with uncertain demand and delayed information 

      Øksendal, Bernt; Sandal, Leif Kristoffer; Ubøe, Jan (Journal article; Peer reviewed, 2014)
      We consider explicit formulae for equilibrium prices in a continuous-time vertical contracting model. A manufacturer sells goods to a retailer, and the objective of both parties is to maximize expected profits. Demand ...

    • Stochastic Stackelberg equilibria with applications to time-dependent newsvendor models 

      Øksendal, Bernt; Sandal, Leif Kristoffer; Ubøe, Jan (Journal article; Peer reviewed, 2013)
      In this paper, we prove a maximum principle for general stochastic differential Stackelberg games, and apply the theory to continuous time newsvendor problems. In the newsvendor problem, a manufacturer sells goods to a ...

    • The Ensemble Kalman Filter for Multidimensional Bioeconomic Models 

      Kvamsdal, Sturla F; Sandal, Leif Kristoffer (Peer reviewed; Journal article, 2015)

    • Transfer of risk in the newsvendor model with discrete demand 

      Jörnsten, Kurt; Nonås, Sigrid Lise; Sandal, Leif Kristoffer; Ubøe, Jan (Journal article; Peer reviewed, 2012)
      In this paper we consider the transfer of risk in a newsvendor model with discrete demand. We view the newsvendor model as a leader/follower problem where the manufacturer (leader) decides the wholesale price and the ...