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	Provedor de dados AgEcon (5) Autor Bamiére, Laure (3) Havlik, Petr (2) Jacquet, Florence (2) Millet, Guy (2) David, Maia (1) Koo, Won W. (1) Swinton, Scott M. (1) Taylor, Richard D. (1) Vermont, Bruno (1) Zhang, Wei (1) van derr Werf, Wopke (1) Mais... Palavra-chave Spatial optimization (5) Environmental Economics and Policy (4) Biodiversity (3) Mathematical programming (3) Agri-environmental policies (2) Resource /Energy Economics and Policy (2) Agricultural and Food Policy (1) Agricultural commodities (1) Biological control (1) China (1) Cost-efficiency (1) Demand (1) Demand and Price Analysis (1) Ecosystem services (1) Farm Management (1) H23 (1) Habitat management (1) Industrial Organization (1) International Development (1) Land use (1) Mais... Tipo do documento Conference Paper or Presentation (4) Report (1) Ano 2011 (1) 2009 (1) 2008 (2) 2007 (1) País United States (5) Idioma Inglês (5)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Spatially explicit farming system modelling for an efficient agri-environmental policy design AgEcon Havlik, Petr; Bamiére, Laure; Jacquet, Florence; Millet, Guy. A mathematical programming model is developed and associated to a spatial pattern index (Ripley L-function) to analyse the optimal reserve design and implementation for the Little Bustard conservation in Plaine de Niort. The model structure corresponds to three spatial levels, fields, farm and landscape. Simple in terms of area representation it is detailed in term of farm behaviour and spatially explicit. The model is applied in a normative and in a positive way. The major findings of the normative approach relate to the trade-offs between the reserve pattern and its cost. It was found that the environmentally optimal reserve, which is randomly dispersed across the zone, is the most costly one. Within the positive approach, it is illustrated that the... Tipo: Conference Paper or Presentation Palavras-chave: Biodiversity; Spatial optimization; Mathematical programming; Agri-environmental policies; Tetrax tetrax; Agricultural and Food Policy; Environmental Economics and Policy; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy. Ano: 2008 URL: http://purl.umn.edu/6676 Expected Changes in China's Grain and Oilseed Industries and Implications for the U.S. and World Agriculture AgEcon Taylor, Richard D.; Koo, Won W.. A spatial optimization model was developed to analyze the impacts of structural changes in China’s consumption of wheat, corn, rice, and soybeans on its agricultural sector and world agricultural trade. The model included 16 exporting and importing countries and regions. China was divided into 31 provinces and the United States into 24 producing regions and 10 consuming regions. The model optimizes agricultural production and distribution systems to meet the predicted demand for grains and oilseeds in 2020 under several assumptions associated with technical progress in producing the grains and oilseeds in China, the United States, and other countries. Tipo: Report Palavras-chave: Spatial optimization; China; Demand; Supply; Trade; Agricultural commodities; Demand and Price Analysis; Industrial Organization; International Development. Ano: 2009 URL: http://purl.umn.edu/51991 Spatially explicit farming system modelling for an efficient agri-environmental policy design AgEcon Havlik, Petr; Bamiére, Laure; Jacquet, Florence; Millet, Guy. A mathematical programming model is developed and associated to a spatial pattern index (Ripley L function) to analyse the optimal reserve design and implementation for the Little Bustard conservation in Plaine de Niort. The model structure corresponds to three spatial levels, fields, farm and landscape. Simple in terms of area representation, it is detailed in terms of farm behaviour and spatially explicit. The model is applied in a normative and in a positive way. The major findings of the normative approach relate to the trade-offs between the reserve pattern and its cost. It was found that the environmentally optimal reserve, which is randomly dispersed across the zone, is the most costly one. Within the positive approach, it is illustrated that the... Tipo: Conference Paper or Presentation Palavras-chave: Biodiversity; Spatial optimization; Mathematical programming; Environmental Economics and Policy; Farm Management. Ano: 2008 URL: http://purl.umn.edu/44172 Agri-Environmental Policies When the Spatial Pattern of Biodiversity Reserves Matters AgEcon Bamiére, Laure; David, Maia; Vermont, Bruno. The aim of this paper is to compare different policy instruments for cost-effective habitat conservation on agricultural lands, when the desired spatial pattern of reserves is a random mosaic. We use a spatially explicit mathematical programming model which studies the farmers' behavior as profit maximizers under technical and administrative constraints. Facing different policy measures, each farmer chooses its land-use at the field level, which determines the landscape at the regional level. A spatial pattern index (Ripley L function) is then associated to the obtained landscape, indicating on the degree of dispersion of the reserve. We compare a subsidy per hectare of reserve with an auction scheme and an agglomeration malus. We find that the auction is... Tipo: Conference Paper or Presentation Palavras-chave: Agri-environmental policies; Biodiversity; Mathematical programming; Spatial optimization; Reserve design; Cost-efficiency; Environmental Economics and Policy; Resource /Energy Economics and Policy; H23; Q57; Q12; Q28. Ano: 2011 URL: http://purl.umn.edu/114239 Spatially Optimal Habitat Management For Natural Pest Control Services AgEcon Zhang, Wei; van derr Werf, Wopke; Swinton, Scott M.. The control of crop pests by their natural enemies represents an important ecosystem service that maintains the stability of agricultural systems and has the potential to mitigate pest control costs. Recently, there has been growing interest in enhancing natural control services via habitat management that provides resources for adult natural enemies, such as food and shelter. Management of natural enemy populations has received little attention in the economic literature on pest control. Most such prior studies have explored optimal chemical-based pest management. One recent paper developed a threshold-based pesticide decision rule to account for the presence of natural enemies. However, no prior studies have investigated economically optimal spatial... Tipo: Conference Paper or Presentation Palavras-chave: Ecosystem services; Biological control; Natural enemies; Habitat management; Soybean aphid; Spatial optimization; Land use; Environmental Economics and Policy. Ano: 2007 URL: http://purl.umn.edu/43030 Registros recuperados: 5 Primeira ... 1 ... Última

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