The paper analyzes the exploitation of a local common where the behavior is steered by altruism rooted in social norms. The analysis is illustrated by using the Gordon-Schäfer model of a fishery. We start by reviewing the standard results when all exploiters are purely egoists; i.e., when own...

A biomass model of a wild salmon (Salmo salar) river recreationalfishery is formulated, and the ways in which economic and biological conditionsinfluence harvesting, stock size, profitability, and the benefit of the anglers arestudied. The demand for recreational angling is met by fishing...

We study optimal fishery management in an age-structured, bio-economic model where two age classes can be harvested independently. We show that the optimal amount of catch differs with age classes, and we derive conditions under which it is optimal to harvest only one age class. Our main policy...

This paper studies the relationship between population size and the rate of time preference (RTP) in pre-capitalist subsistence agricultural communities. The RTP is reflected in the community's propensity to invest in and maintain new arable land that may be considered as an inherent...

This paper studies the relationship between population size and the rate of time preference (RTP) in pre-capitalist subsistence agricultural communities. The RTP is reflected in the community´s propensity to invest in and maintain new arable land that may be considered as an inherent...

We study the economy and ecology of sheep farming under future climate change scenarios. The analysis is at the farm level and includes two different categories of the animals, ewes (adult females) and lambs with a crucial distinction between the outdoors grazing season and the winter indoors...

This chapter develops a sustainable economic yield harvesting model for the wild Atlantic salmon (Salmo salar) where the population comprises different age classes. It is shown that the weight–fecundity relationship of the spawning population, comprising two age classes, is crucial for the...

This paper explores the ecological and economic impacts of interactions between escaped farmed and wild Atlantic salmon (Salmo salar, Salmonidae) over generations. An age- and stage-structured bioeconomic model is developed. The biological part of the model includes age-specific life history...

The escape of cultured fish from a marine aquaculture facility is a type of biological invasion that may lead to a variety of potential ecological and economic effects on native fish. This paper develops a general invasive species impact model to capture explicitly both the ecological and...