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Full-Text Articles in Social and Behavioral Sciences
Ecological Benchmarking To Explore Alternative Fishing Schemes To Protect Endangered Species By Substitution : The Danish Demersal Fishery In The North Sea, Niels Vestergaard, Jens Kjærsgaard, Kristiaan Kerstens
Ecological Benchmarking To Explore Alternative Fishing Schemes To Protect Endangered Species By Substitution : The Danish Demersal Fishery In The North Sea, Niels Vestergaard, Jens Kjærsgaard, Kristiaan Kerstens
Niels Vestergaard
The cod stock in the North Sea is threatened by overexploitation. To recover this fishing stock, pressure needs to be reduced. This implies that catch compositions with small amounts of cod are preferred by public policy makers. The present analysis assesses the technological efficiency of fishing trips in terms of the substitution possibilities away from cod by considering landings of cod as an undesirable output. A conservative non-parametric frontier technology approach imposing minimal assumptions and based on directional distance functions is applied to explore alternative fishing activities for Danish gill netters operating in the North Sea with the goal of …
Revenue-Based Capacity Utilisation Measures And Decomposition: The Case Of Danish North Sea Trawlers, Erik Lindebo, Ayoe Hoff, Niels Vestergaard
Revenue-Based Capacity Utilisation Measures And Decomposition: The Case Of Danish North Sea Trawlers, Erik Lindebo, Ayoe Hoff, Niels Vestergaard
Niels Vestergaard
In fisheries, capacity analysis has largely been limited to measuring physical capacity, defined as the maximum amount of output that can be produced per unit of time, given existing plant and equipment and unrestricted availability of variable inputs. An economic measure of capacity can be defined as the maximum revenue attainable for the given fixed inputs, using relevant outputs and output prices. This paper examines these two approaches to capacity by applying data envelopment analysis to physical and economic input/output data for Danish North Sea trawlers. The economic and physical measures are compared and contrasted using correlation analysis. An innovative …
A Short-Run Johansen Industry Model For Common-Pool Resources: Planning A Fishery's Industrial Capacity To Curb Overfishing, Kristiaan Kerstens, Niels Vestergaard, Dale Squires
A Short-Run Johansen Industry Model For Common-Pool Resources: Planning A Fishery's Industrial Capacity To Curb Overfishing, Kristiaan Kerstens, Niels Vestergaard, Dale Squires
Niels Vestergaard
Current methods for assessing capacity and its utilisation in fisheries operate at the firm-level, but neglect industry capacity. Here, we introduce the Johansen-Färe measure of plant capacity of the firm into a multi-output, frontier-based version of the short-run Johansen industry model. The model determines firm capacity utilisation such that current industry outputs are maintained, while minimising the use of fixed inputs at industry level and assuming abundant variable inputs. Policy extensions relevant to combating overfishing include tightening quotas, seasonal closures, linking economic and plant capacity, decommissioning schemes and area closures, implementation issues and equity considerations. The application to the Danish …
Methodological Reflections On The Short-Run Johansen Industry Model In Relation To Capacity Management, Kristriaan Kerstens, Dale Squires, Niels Vestergaard
Methodological Reflections On The Short-Run Johansen Industry Model In Relation To Capacity Management, Kristriaan Kerstens, Dale Squires, Niels Vestergaard
Niels Vestergaard
The specification of a convex production technology is a potential issue in estimating firm-level Johansen plant capacity utilisation rates and their subsequent use in the short-run Johansen industry capacity model of the fishery. There are different plant capacity utilisation estimates with convex and nonconvex technologies. When entered as parameters in the short-run Johansen industry model, this leads to different distributions in the activity vectors. With non-convex technology, more vessels remain active in the fleet, and there is no longer an overestimation of the number of decommissioned vessels compared to the use of a convex technology. A second methodological reflection involves …
Fishing Capacity In Europe: Special Issue Introduction, Niels Vestergaard
Fishing Capacity In Europe: Special Issue Introduction, Niels Vestergaard
Niels Vestergaard
No abstract provided.
Technical Efficiency Of The Danish Trawl Fleet: Are The Industrial Vessels Better Than Others?, Niels Vestergaard, Dale Squires, Frank Jensen, Jesper Levring Andersen
Technical Efficiency Of The Danish Trawl Fleet: Are The Industrial Vessels Better Than Others?, Niels Vestergaard, Dale Squires, Frank Jensen, Jesper Levring Andersen
Niels Vestergaard
Technical efficiency in the Danish trawl fishery in the North Sea is estimated for 1997-1998 with a stochastic production frontier model. This model allows for both technical efficiency and a stochastic environment. The results show that the production frontier can be modelled by a translog function with time effects and a technical inefficiency function. The type of fishery (industrial or consumption) and size of vessel give a good explanation for the inefficiency of the fleet. The average technical efficiency is estimated to be 0.80. On avrage, industrial vessels have a higher technical efficiency than human consumption vessels, and smaller industrial …