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Distributional effects of marine protected areas. A study of the North-East Atlantic cod fishery
(Working paper; Arbeidsnotat, 2003-01)
This paper studies the distributional effects of the implementation of a marine
protected area (MPA) for the North-East Atlantic cod stock. A bioeconomic cohort
model with two agents targeting different age groups is used to examine how the
establishment of an MPA may affect the payoffs to the two main vessel types used to
exploit cod, namely, trawlers and coastal vessels. Cooperative and ...
Should environmental projects be subsidised? An empirical analysis
(Working paper; Arbeidsnotat, 2003-12)
Imperfect markets, asymmetric information and transboundary pollution are all characteristics that
in most cases lead to inefficient “market” outcomes, and which thus are arguments for (public)
intervention in the market. On the other hand, these characteristics also imply strategic behaviour
by the economic agents, and then the effects of public intervention may be different from the
traditional ...
Excess entry in vertically related markets
(Working paper; Arbeidsnotat, 2003-12)
This paper considers the problem of excess entry in vertically related markets
when the regulator can regulate market structure and access charges.
The endogenous access charge introduces an asymmetry between firms which
affects the degree of excess entry. I find that the excess entry result of Mankiw
and Whinston (1986) does not generally carry over to vertically related markets.
It is shown ...
Conservation of wildlife. A bio-economic model of a wildlife reserve under the pressure of habitat destruction and harvesting outside the reserve
(Working paper; Arbeidsnotat, 2003-09)
Biodiversity is today threatened by many factors of which destruction and reduction of
habitats are considered most important for terrestrial species. One way to counteract these
threats is to establish reserves with restrictions on land-use and exploitation. However, very
few reserves can be considered islands, wildlife species roam over large expanses, often via
some density dependent dispersal ...
Quotas, marine reserves and fishing the line. When does marine reserve creation pay?
(Working paper; Arbeidsnotat, 2003-11)
This paper explores the issue of using marine reserves in combination with quotas as
fisheries management tools using a patchy environment model as the biological
foundation. The rent generated by fishing on the total population, using optimal
quotas as a management tool, is compared to the rent from the fishery when managed
with quotas and a marine reserve. This is done under different assumptions ...
Using history dependence to design a dynamic tradeable quota system under market imperfections
(Working paper; Arbeidsnotat, 2003-11)
A transferable quota system is analysed in a two-period model with market power. So far, the
management mechanisms presented in the literature to remedy market power have either not
succeeded in securing efficiency in the distribution of quota within and across time periods, or
have resulted in only one of the two inefficiencies being eliminated. In this paper a new
mechanism is introduced where ...
Regulation and foreclosure
(Working paper; Arbeidsnotat, 2003-12)
The paper considers the optimal regulation of access charges, and the
effect such regulation has on incentives to foreclose downstream rival firms.
I show that when a vertically integrated firm is able to discriminate against
rivals by means of non-price measures, optimal access charges must be set
higher than in the case when no discrimination is possible and will always
provide a positive ...
Regulation of a vertically differentiated duopoly
(Working paper; Arbeidsnotat, 2003-12)
This paper focuses on the optimal quality regulation of vertically differentiated
duopolies in the presence of asymmetric information. In the model
presented there are cross-effects on the information rent. Contrary to standard
single-agent models, the production levels are distorted in favour of the most
efficient firm, whose production level is increased under asymmetric information
relative ...
Do incumbents have incentives to degrade interconnection quality in the internet?
(Working paper; Arbeidsnotat, 2003-12)
In this paper we analyze the interconnection incentives for firms that have
an installed base of customers and that also compete for new customers. We show that the
small firm may be harmed in the competition for new customers if the customers in the
installed bases are charged a high price, since this makes the large firm more aggressive. It
is also shown that the price charged to the installed ...