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	Provedor de dados AgEcon (3) Autor Asheim, Leif Jarle (3) Richardson, James W. (2) Feldman, Paul A. (1) Lien, Gudbrand D. (1) Mysterud, Ivar (1) Schumann, Keith D. (1) Tveteras, Ragnar (1) Veggeland, Frode (1) Mais... Palavra-chave Livestock Production/Industries (3) C50 (1) C60 (1) Carnivores (1) Dairy production (1) Econometric model (1) External effects (1) Home range areas (1) International trade (1) Livestock guard dogs (1) Northern Norway (1) Predation (1) Preventive methods (1) Programming model (1) Risks (1) Salmon (1) Sheep losses. (1) Stochastic optimization (1) Stochastic simulation (1) Yield risks (1) Mais... Tipo do documento Conference Paper or Presentation (3) Ano 2005 (2) 2003 (1) País United States (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última External Effects of Mitigating Measures to Reduce Large Carnivore Predation on Sheep AgEcon Asheim, Leif Jarle; Mysterud, Ivar. Outfield range pastures with widely dispersed sheep are quite common in Norway, with a summer population of approximately 2.4 million animals. In many areas losses to predators are considerable and identifying efficient mitigating measures against predation is a prime target in nature management. In order to assess economic efficiency, any actual effect of the measure on predation and loss regime must be addressed. One problem with some research is the "scale problem". While sheep outfield home range areas have been measured from 2.2 - 33.8 km2, large carnivores on their ranges might use from several hundred up to even thousands of square kilometres. For lynx (Lynx lynx) the home range varies between 158 and 433 km2, wolverine (Gulo gulo) between 61 and... Tipo: Conference Paper or Presentation Palavras-chave: Carnivores; External effects; Home range areas; Livestock guard dogs; Predation; Preventive methods; Sheep losses.; Livestock Production/Industries. Ano: 2003 URL: http://purl.umn.edu/24342 Modelling Risks in the Salmon Industry and Markets AgEcon Asheim, Leif Jarle; Lien, Gudbrand D.; Richardson, James W.; Tveteras, Ragnar; Veggeland, Frode. The paper proposes developing a trade model for salmon to assist in discussions and negotiations of current international salmon trade issues and major risk problems facing the salmon industry. Two modeling approaches are discussed: 1) developing a traditional equilibrium trade programming model designed to maximize total welfare across all model regions by solving for a medium-term price that balances the amount of salmon supplied by the world region to the among processed and consumed by this region; and 2) developing an econometric stochastic simulation model based on linear or non-linear equations. Some disadvantages and weaknesses of the programming model are discussed, whereas the econometric model needs further exploration and consideration. The... Tipo: Conference Paper or Presentation Palavras-chave: Risks; Salmon; Programming model; Econometric model; International trade; Livestock Production/Industries; C60; C50. Ano: 2005 URL: http://purl.umn.edu/56000 Stochastic Optimization: An Application to Sub-Arctic Dairy Farming AgEcon Asheim, Leif Jarle; Richardson, James W.; Schumann, Keith D.; Feldman, Paul A.. The paper demonstrates how a deterministic farm linear programming (LP) model can be made stochastic and simulated using Solver and Simetar© in Excel©. The demonstration is conducted with an LP-model for a dairy farm for a sub arctic region of Norway. The income risks arising from variation in milk and crop yields due to winter damage in leys and pastures have been quantified for farms demonstrating low, medium and high forage yield risk. The estimated distribution of farm profit will be skewed to the left, indicating a downside risk. In the presence of risks, farmers maximize income by producing the milk quota with using surplus forage for meat production. The analysis demonstrated here may assist farmers and farm managers in improving sensitivity... Tipo: Conference Paper or Presentation Palavras-chave: Dairy production; Northern Norway; Stochastic optimization; Stochastic simulation; Yield risks; Livestock Production/Industries. Ano: 2005 URL: http://purl.umn.edu/24253 Registros recuperados: 3 Primeira ... 1 ... Última

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