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Fokus på økonomien i de nordiske fiskerier. Sjarkfiske med 8-14,9 m båter i Norge
(Working paper; Arbeidsnotat, 2006-09)
Nature reserves as a bioeconomic management tool. A simplified modeling approach
(Working paper; Arbeidsnotat, 2006-02)
This paper demonstrates analytically how a nature reserve may protect the total population, realize
maximum sustainable yield (MSY), maximum economic yield (MEY) and consumer surplus (CS)
and how this depends on biological growth, migration, reserve size and economic parameters. The
pre-reserve population is assumed to follow the logistic growth law and two post-reserve growth
models are discussed. ...
Water demand and the urban poor. A study of the factors influencing water consumption among housholds in Cape Town, South Africa
(Working paper; Arbeidsnotat, 2006-01)
Water demand management is a key focus area for most water managers and even more so in developing countries.
Improved access to water is important to the poor. Water scarcity makes efficient management even more urgent and it
creates more conflicts in water distribution. Different policies have been introduced to ensure a water management system
that cares for the poor, among them the Increasing ...
Is migration important for regional convergence? Comparative evidence for Norwegian and Swedish counties, 1980-2000
(Working paper; Arbeidsnotat, 2006-06)
Regional convergence studies have relied on net migration data in assessing the impact of migration. With
heterogeneous labour, the implied symmetrical treatment of immigration and emigration cannot be justified a
priori.. Because of heterogeneity among migrants, gross migration flows may lead to considerable interregional
redistribution of human capital even when net migration is zero. Moreover, ...
Product and process innovation in a differentiated goods duopoly
(Working paper; Arbeidsnotat, 2006-09)
This paper compares Bertrand and Cournot equilibria in a differentiated duopoly with R&D
competition or cooperation, where R&D may affect both unit cost of production and the
size of the market. This combination of product and process innovation is shown to allow
for the reversal of some results found in earlier models that only look at one of the two
types of R&D effects. We find that for a ...
Efficiency in complementary partnerships with competition
(Working paper; Arbeidsnotat, 2006-01)
This paper investigates a market with strictly complementary inputs, with
a particular emphasis on how efficiency can be implemented when the productive
firms undertake unobservable effort. It is shown that simple linear sharing
rules cannot implement socially optimal effort, but a modified linear sharing
rule can implement the first-best outcome and a restricted linear sharing rule
can be used ...
Aquaculture-fisheries interactions
(Working paper; Arbeidsnotat, 2006-02)
Assuming externalities from aquaculture to fisheries, we use a Verhulst-Schaefer model of
fish population-dynamics and production, coupled with an aquaculture production model, to
investigate effects on open-access and rent-maximising fisheries. Externalities are modelled
by letting carrying capacity, intrinsic growth rate or catchability coefficient in the fishery
depend on aquaculture production. ...
A note on the ecological-economic modelling of marine reserves in fisheries
(Working paper; Arbeidsnotat, 2006-03)
This paper gives an overview of bioeconomic modelling of marine reserves, and
illustrates how economists have responded to the modelling results found in the
ecological literature. The economic analysis is shown to be far more pessimistic with
regard to the potential of marine reserves as a fisheries management tool, than what
one finds in the purely ecological analysis, the reason being the ...
Endogenous technology sharing in R&D intensive industries
(Working paper; Arbeidsnotat, 2006-06-26)
This paper analyses the endogenous formation of technology sharing coalitions with asymmetric
firms. Coalition partners enjoy perfect spillovers from technology advancements by
their coalition partners, but each firm determines its R&D investment level non-cooperatively
and there is no co-operation in the product market. We show that the equilibrium coalition
outcome is one between the two most ...
Rational benevolence in small committees
(Working paper; Arbeidsnotat, 2006-09)
We consider a pie-splitting game involving three committee members. In response to
the large literature on sequential procedures in this type of game, we propose an
institution that is inspired by auction theory. The (sealed) bids of the players are
proposals for a distribution of the pie and are given simultaneously. If any of the bids
is preferred to all others in a pairwise comparison (i.e. ...