Now showing items 21-30 of 33
Kappfiske - problem eller løsning?
(Working paper; Arbeidsnotat, 2005-02)
Landingene av torsk i Norge er sterkt sesongvarierte. Fangstene i første halvår i årene 1983- 84 utgjorde om lag 85 % av årets totalfangst. I 1986-88 var andelen sunket til om lag 70 %, mens den steg til 80 % i 1999-2000 og til 90 % i 2001-02. Dette landingsmønsteret for kystflåtens fangster av torskefisk er et resultat av en rekke faktorer; fiskens tilgjengelighet, kvalitet, pris, flåtestruktur, ...
Tournaments with multi-tasking
(Working paper; Arbeidsnotat, 2005-08)
The standard contest model in which participants compete in a single dimension is well understood and documented. In this paper we propose an extension in which competition ensues in several dimensions and a competitor that wins a certain number of these is awarded a prize. We look at the design of this contest from the point of view of maximizing effort in the contest (per dimension and totally), ...
Fragmented property rights, R & D and market structure
(Working paper; Arbeidsnotat, 2005-04)
Fragmented property rights can be a factor that limits firms’ willingness to invest in the development and commercialization of new products. This paper studies the interaction between markets for products and markets for intellectual property rights (patents) where product innovation requires several complementary patents, each of which is obtained as the result of a patent race. We show that ...
Why potential entry may increase platform sponsors' profit
(Working paper; Arbeidsnotat, 2005-09)
In this paper we analyze the incentives for platform sponsors to open up their networks for independent rivals. We show that open access may increase the platform sponsors’ profit levels and enhance quality improving investments.
A survey of the riparian Coleoptera fauna along the river Altaelva after 15 years with regulation
(Master thesis; Mastergradsoppgave, 2005-05)
The riparian Coleoptera fauna of the river Altaelva, Finmark County, Northern Norway, has been surveyed in summer 2002 and 2003. The river Altaelva has been regulated since 1987, and my objective was to investigate the effect of the regulation on the riparian fauna. In total, 37 localities were examined, and four methods were used: hand collecting, washing without area limitation, quadrate sampling ...
Contingent payments in selection contests
(Working paper; Arbeidsnotat, 2005-04)
The early literature on research contests stressed the advantages of a fixed prize in inspiring R&D effort. More recently the focus has moved towards endogenizing the rewards to research activity in these tournament settings, since this can induce extra effort or enhance the surplus of the buyer. We focus on a research contest as a means of selecting a partner for an R&D enterprise, in an ...
Cultural eutrophication: perspectives and prospects
(Chapter; Bokkapittel, 2005-01-06)
History of cultural eutrophication. Cultural eutrophication is old as Homo sapiens. In particular after the introduction of agriculture and larger settlements eutrophication has been mans faithful companion. During the pre-agricultural hunting and picking stage only probably a couple million humans inhabited the world and cultural eutrophication was negligible. The 3 orders of magnitude ...
The Northern fisheries of the Russian Federation. Institutions in transition
(Master thesis; Mastergradsoppgave, 2005-05-23)
The existing management system in the Russian fishing industry was created as a result of the political, economic and institutional transformations that took place in Russia after the dissolution of the Soviet Union in 1990. This thesis analyses the processes in the fisheries that led to the establishment of the existing institutional and management practice. The study seeks to find out how the ...
A shortcut method for sexing juvenile European sea bass, Dicentrarchus labrax L.
(Journal article; Tidsskriftartikkel; Peer reviewed, 2005)
The objective of this study was to develop a rapid and effective method of sexing juvenile sea bass with minimum labour and material.To this end, the gonad squash mount technique was applied along with macroscopic techniques for sexing a large number of experimental fish at the age of 215-275 days post fertilization (p.f.). At this age, 90% of the 3894 fish could be unambiguously sexed by ...
Registreringer av lakselus på laks, sjøørret og sjørøye i 2004
(Research report; Forskningsrapport, 2005-06)
Results from 2004 showed that the lice infection pressure varied between the different monitoring stations in time and space and that the overall pattern was moderate to high infection in all areas. This is in spite of the fact that the fish farmers have improved their implementation of delousing strategies in fish farms. The density of fish farms is high all along the coast. The total biomass may ...