Browsing Discussion papers (FOR) by Author "Steinshamn, Stein Ivar"
Now showing items 1-20 of 21
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Adaptive regulation with flow and stock externalities
Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 1998-01)In confronting a consumer good whose production process is associated with both flow and stock externalities, a corrective tax is introduced to restore efficiency. The objective is to maximize social welfare over time when ... -
An approach to adaptive carbon taxes in the presence of global warming
Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 1998-01)The optimal extraction path of fossil fuels and the corresponding corrective tax on extraction are derived when two types of externalities associated with emission of carbondioxide (CO2) are taken into account. The optimal ... -
Assimilation of real time series data into a dynamic bioeconomic fisheries model : an application to the Norwegian cod fishery stock
Ussif, Al-Amin M.; Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 2000-05)This paper combines the new and elegant technique of inverse methods and a Monte Carlo procedure to analyze real data for the Norwegian cod fishery (NCF) stock. A simple nonlinear dynamic resource model is calibrated to ... -
Coalition Formation with Externalities: The Case of the Northeast Atlantic Mackerel Fishery in a Pre and Post Brexit Context
Toumasatos, Evangelos; Steinshamn, Stein Ivar (Discussion paper;11/17, Working paper, 2017-10-18)In this paper we apply the so-called partition function approach to study coalition formation in the North-east Atlantic mackerel fishery in the presence of externalities. Atlantic mackerel is mainly exploited by the ... -
Continuous harvesting costs in sole-owner fisheries with increasing marginal returns
Maroto, Jose M.; Moran, Manuel; Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 2009-09)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. ... -
Data assimilation into biomass dynamics models : a Monte Carlo simulation experiment
Ussif, Al-Amin M.; Sandal, Leif Kristoffer; Steinshamn, Stein Ivar; Morey, Steven L. (Discussion paper, Working paper, 2001)In this paper, we use a variational data assimilation method to fit biomass dynamics models to simulated data. The method is the variational adjoint technique in which a cost function measuring the distance between the ... -
Do species interactions and stochasticity matter to optimal management of multispecies fisheries?
Poudel, Diwakar; Sandal, Leif Kristoffer; Steinshamn, Stein Ivar; Kvamsdal, Sturla Furunes (Discussion paper;2012:1, Working paper, 2012-01)The multispecies fisheries management looks at a bigger picture in addressing the long-term consequences of present decisions. This implies an ecosystem management that includes a number of species and their physical, ... -
Does stochasticity matter? : dynamic pigouvian taxation in an uncertain environment
Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 2004-04)The effects of discounting, stochasticity, non-linearities and maximum decay upon an optimal corrective tax are analyzed using stochastic dynamic optimization. Optimal corrective taxes are derived as explicit feedback ... -
Estimation of biological and economic parameters of a bioeconomic fisheries model using dynamical data assimilation
Ussif, Al-Amin M.; Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 2000-05)A new approach of model parameter estimation is used with simulated measurements to recover both biological and economic input parameters of a natural resource model. The procedure efficiently combines time series of ... -
Fish wars on the high seas : a straddling stock competition model
McKelvey, Robert W.; Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 2001-04)The post World War II era saw the development of powerful self-contained fishing fleets, so-called distant-water fleets (DWFs), which roamed the worlds oceans, seeking out rich harvesting targets wherever they might be ... -
Fisheries management under irreversible investment : does stochasticity matter?
Poudel, Diwakar; Sandal, Leif Kristoffer; Kvamsdal, Sturla Furunes; Steinshamn, Stein Ivar (Discussion paper;2011:20, Working paper, 2011-11)We present a continuous, nonlinear, stochastic and dynamic model for capital investment in the exploitation of a renewable resource. Both the resource stock and capital stock are treated as state variables. The resource ... -
A hit-and-run interloper model for a regional fisheries management on the high sea
Sandal, Leif Kristoffer; Steinshamn, Stein Ivar; McKelvey, Robert W. (Discussion paper, Working paper, 2002-07)The 1993 U.N. Straddling Stock Agreement prescribes a multi-national organizational structure for management of an exploited marine fish stock, one whose range straddles both .Extended Economic Zones. (EEZs) and high seas ... -
Hydrogen in Renewable-Intensive Energy Systems: Path to Becoming a Cost-Effective and Efficient Storage Solution
Qu, Chunzi; Bang, Rasmus Noss; Sandal, Leif K.; Steinshamn, Stein Ivar (Discussion paper;01/25, Working paper, 2025-01-13)This paper examines the integration of hydrogen storage in renewable-intensive energy systems. Current hydrogen storage technology is too costly and inefficient, but reducing hydrogen costs to 12.5% of current levels and ... -
Implications of a nested stochastic/deterministic bio-economic model for a pelagic fishery
McDonald, A. David; Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 2001-03)Use is made of an economically optimal feedback rule to determine optimal levels of exploitation of a pelagic fish species. Data from the southern bluefin tuna fishery for the years 1960-1996 are utilized to apply this ... -
Irreversible Investments Revisited
Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 2006-07)A non-linear dynamic model in two state variables, two controls and three cost terms is presented for the purpose of finding the optimal combination of exploitation and capital investment in optimal renewable resource ... -
More is less : the tax effects of ignoring flow externalities
Sandal, Leif Kristoffer; Steinshamn, Stein Ivar; Grafton, R. Quentin (Discussion paper, Working paper, 2000-11)Using a model of nonlinear decay of the stock pollutant, and starting from the same initial conditions, the paper shows that a tax that only corrects for stock externalities can, at the steady state, be higher than a tax ... -
A new approach of fitting biomass dynamics models to real data based on a linear total allowable catch (TAC) rule : an optimal control approach
Ussif, Al-Amin M.; Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 2000-05)A non-traditional approach of fitting dynamic resource biomass models to data is developed in this paper. The adjoint technique is an optimal control or a variational method for parameter identification. It provides a novel ... -
On the dynamics of commercial fishing and parameter identification
Ussif, Al-Amin M.; Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 2000-05)This paper has two main objectives. The first is to develop dynamic models of commercial fisheries different from the existing models. The industry is assumed to have a well defined index of performance based on which it ... -
Optimal fishing mortalities with age-structured bioeconomic model - a case of NEA mackerel
Ni, Yuanming; Steinshamn, Stein Ivar (Discussion paper;9/16, Working paper, 2016-05-31)The effects of random environmental impacts on optimal exploitation of a fish population are investigated using both optimization and simulation, based on a discrete-time age-structured bioeconomic model. The optimization ... -
Optimal management of renewable resources : a general feedback approach
Sandal, Leif Kristoffer; Steinshamn, Stein Ivar (Discussion paper, Working paper, 1998-09)Analytical solutions for optimal exploitation of renewable capital stocks are derived as feedback rules for a quite general optimization problem. By feedback rules is meant that optimal exploitation is given as an explicit ...