• Modeling the Norwegian sea ‘pelagic complex’. An application of the ensemble kalman filter 

      Ekerhovd, Nils-Arne; Kvamsdal, Sturla Furunes (Working paper;07/13, Working paper, 2013-02)
      We have estimated the parameters of a modified logistic ecosystem model of the pelagic fish stocks in the Norwegian Sea with the Ensemble Kalman Filter. Our model only contains four parameters. The model appear to capture ...
    • The premium of marine protected areas : a simple valuation model 

      Kvamsdal, Sturla Furunes; Sandal, Leif Kristoffer (Working paper, Working paper, 2007-03)
      Marine Protected Areas are considered as a hedging tool against some of the uncertainties that trouble many fisheries today. Such tools are always connected with a cost; a premium. An optimal harvest rule is combined with ...
    • The ensemble kalman filter for multidimensional bioeconomic models 

      Kvamsdal, Sturla Furunes; Sandal, Leif Kristoffer (Working papers;04/14, Working paper, 2014-03)
      To serve the needs for integrating economic considerations into management decisions in ecosystem frameworks, we need to build models that capture observed system dynamics and incorporate existing knowledge of ecosystems ...
    • Up the Ante on Bioeconomic Submodels of Marine Foodwebs : a data assimilation-based approach 

      Ekerhovd, Nils-Arne; Kvamsdal, Sturla Furunes (Working paper;13/14, Working paper, 2014-09)
      While economists have discussed ecosystem-based management and similar concepts, little attention has been devoted to the art of modeling. Models of ecosystems or foodwebs that make economic analysis viable should capture ...