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| Eastwood, Callum; Krausse, Michael; Alexander, Robert R.. |
| Soil erosion research in New Zealand has focused on the on-site costs of soil loss in the form of production loss and storm damage. Subsidization and implementation of soil conservation measures have primarily been justified through maintenance or improvement of farm productivity levels. The shift in responsibility for soil conservation management and damage remedies from national to regional government has highlighted public good issues raised by soil erosion. This paper develops an inventory and assessment of the relative magnitude of the impacts of soil erosion and sedimentation in New Zealand. It also provides an estimate of the total economic costs of these impacts based on the limited data available. The impacts of greatest economic significance are... |
| Tipo: Presentation |
Palavras-chave: Crop Production/Industries. |
| Ano: 2000 |
URL: http://purl.umn.edu/123632 |
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| Fleming, Christopher M.; Alexander, Robert R.. |
| Ecologists frequently note the importance of modelling entire ecosystems rather than single species, but most bioeconomic models in the current literature focus on a single species. While the mathematical difficulty of multiple species may quickly become overwhelming, sometimes making the single species option necessary, it is important to recognise the significance of the single species assumption to the model results. In this paper, the authors address the economic significance of this assumption through the development of a multiple species model and demonstrate the importance of interrelationships and economic values to the survival of endangered species. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2002 |
URL: http://purl.umn.edu/23693 |
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| Alexander, Robert R.; Shields, David W.. |
| The bioeconomic analysis of endangered species without consumptive values can be problematic when analysed with density-dependent models that assume a fixed environment size. Most bioeconomic models use harvest as a control variable, yet when modelling non-harvestable species, frequently the only variable under control of conservationists is the quantity of habitat to be made available. The authors explore the implications of this in a model developed to analyse the potential population recovery of New Zealand's yellow-eyed penguin. The penguin faces severe competition with man for the terrestrial resources required for breeding and has declined in population to perilously low levels. The model was developed to estimate the land use required for recovery... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Land Economics/Use. |
| Ano: 2002 |
URL: http://purl.umn.edu/23694 |
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| Krausse, Michael; Alexander, Robert R.. |
| This paper explores the effect of an individual’s knowledge of biodiversity on the nature of his or her preferences for its preservation. Previous research suggests that individuals have a limited understanding of the concept of biodiversity and that some may be unwilling to trade-off changes in biodiversity against income. We hypothesize that the way in which individuals understand biodiversity is such that meaningful preferences for biodiversity preservation are more likely to be expressed for large scale non-marginal changes (i.e. a regional or greater scope geographically and at a genus or greater scope genetically). Similarly we suggest that individuals can express preferences for different management regimes or policies at a large scale but are... |
| Tipo: Presentation |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1999 |
URL: http://purl.umn.edu/123828 |
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