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| Gatzweiler, Franz W.; Reichhuber, Anke; Hein, Lars. |
| Ethiopian montane rainforests are economically valuable repositories of biodiversity, especially of wild Coffea arabica populations, and they are vanishing at accelerating rates. Our research results confirm theory which explains biodiversity loss by diverging private and social net benefits from land conversion. Poor farmers basically live from hand-to-mouth and manage resources with very short term planning horizons. In such circumstances they cannot afford to carry the cost burden of conservation from which the broader national and global society benefits. Society, on the other hand, highly values the biodiversity of Ethiopia's montane rainforests, but has not managed to put mechanisms in place which enable to pay for the conservation of these values... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/7119 |
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| Hein, Lars; Weikard, Hans-Peter. |
| Economic modelling of semi-arid rangelands has received much attention in recent literature. A major outstanding issue is how stochastic rainfall and the feedback effect of heavy grazing pressures on vegetation productivity can be accounted for in these models. This paper presents a model for calculating the optimal livestock stocking rate in a semi-arid rangeland that accounts for stochastic rainfall, the ecological feedback effect and variable prices. The model is developed for rangelands dominated by annual rather than perennial grasses, such as the African Sahel. The feedback effect is modeled on the basis of an ecological study, conducted in northern Senegal, that analyzes the impact of different grazing pressures on vegetation productivity. The paper... |
| Tipo: Journal Article |
Palavras-chave: Semi-arid rangelands; Optimal stocking rate; Modeling rangeland ecology; Sahel; Livestock Production/Industries; Q24; D24. |
| Ano: 2008 |
URL: http://purl.umn.edu/56959 |
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