• Benefits of stock enhancement: The case of the Iranian kutum fishery 

      Steinshamn, Stein Ivar; Borujeni, Pezhman Alaei (Working paper;14/14, Working paper, 2014-12)
      Harvesting of the fish resources as an economic activity, which is strictly tied to biological matters, needs to be modeled proficiently through bioeconomic analysis. In this study, a bioeconomic age-structured model is ...
    • Continuous harvesting costs in sole-owner fisheries with increasing marginal returns 

      Sandal, Leif Kristoffer; Steinshamn, Stein Ivar; Maroto, Jose M.; Moran, Manuel (Working paper, Working paper, 2009-06)
      We develop a bioeconomic model to analyze a sole-owner fishery with fixed costs as well as a continuous cost function for the generalized Cobb-Douglas production function with increasing marginal returns to effort level. ...
    • Generalization of age-structured bioeconomic models in theory and practice 

      Steinshamn, Stein Ivar (Working paper, Working paper, 2010-08)
      The harvesting functions and the stock dynamics in age-structured bioeconomic models are generalized in order to incorporate density dependence. Using this generalization anything from completely uniformly distributed fish ...