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| Registros recuperados: 284 | |
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| Freshwater, David. |
| Agricultural data systems remain based upon now obsolete concepts. In particular, the "full-time, family farm" is still organizing concepts for much of the farm data system, and for agricultural policies. Yet farming has clearly bifurcated into: a relatively small number of large farms that produce the majority of the food and fiber; and a large number of small part-time farms that depend mainly on off-farm income for household well-being. Both types are family farms, but they are not the family farms of the past. It is broadly recognized that large farms pose complex challenges for data collection and policy. But small farms are also complex. While small farms may not account for much production they are important for land use issues and for maintaining... |
| Tipo: Working Paper |
Palavras-chave: Data concepts; Farm policy; Agricultural policy; Canada; Data collection; Risk; Agricultural and Food Policy; Farm Management; Risk and Uncertainty. |
| Ano: 2012 |
URL: http://purl.umn.edu/119473 |
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| Wilson, William W.; Dahl, Bruce L.. |
| Canola has become an important crop in the last decade in the U.S. Production of canola is risky and competes with other crops which have a range of risk reduction mechanisms. Alternative contracting strategies were evaluated by comparing returns to labor and management for growers and gross margins for processors. Alternative contracting strategies included no contract, fixed price with and without act of god provisions, and an oil premium contract. Grower returns and processor gross margins were simulated and resulting distributions were evaluated using stochastic efficiency with respect to a function. We estimated certainty equivalents and ranked contract preferences for both growers and processors by region in North Dakota. Grower and processor risk... |
| Tipo: Report |
Palavras-chave: Canola; Grower; Processor; Contracting; Risk; Stochastic Efficiency (SERF).; Agricultural Finance; Crop Production/Industries. |
| Ano: 2010 |
URL: http://purl.umn.edu/95751 |
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| Conte,Juan C.; Rubio,Emilio A.; García,Ana I.; Cano,Francisco J.. |
| We present a new generalized model for the diagnosis and prediction of accidents among the Spanish workforce. Based on observational data of the accident rate in all Spanish companies over eleven years (7,519,732 accidents), we classified them in a new risk-injury contingency table (19×19). Through correspondence analysis, we obtained a structure composed of three axes whose combination identifies three separate risk and injury groups, which we used as a general Spanish pattern. The most likely or frequent relationships between the risk and injuries identified in the pattern facilitated the decision-making process in companies at an early stage of risk assessment. Each risk-injury group has its own characteristics, which are understandable within the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Correspondence model; Contingency analysis; Risk; Injury; Occupational accidents. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300031 |
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| Wilson, William W.; Dahl, Bruce L.. |
| Development of genetically modified crops is challenging the functions of the grain marketing system with many participants arguing for Identity Preservation systems prior to release of GM varieties. In this study, a stochastic optimization model was developed to determine optimal testing strategies. The model chooses the optimal testing strategy that maximizes utility (minimizes disutility) of additional system costs due to testing and rejection and allows estimation of the risk premium required for sellers to undertake a dual marketing system with GM/Non-GM segregations over the current Non-GM system. Elements of costs (testing costs, rejection costs, and risk premium) were estimated for a base model representing a grain export chain. The model... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Genetically modified organisms; Biotechnology; Wheat; Risk; Segregation; Identity preservation; Crop Production/Industries. |
| Ano: 2002 |
URL: http://purl.umn.edu/23480 |
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| Wilson, William W.; Dahl, Bruce L.. |
| Development of genetically modified crops is challenging the functions of the grain marketing system with many participants arguing for Identity Preservation (IP) systems prior to release of GM varieties. In this study, a stochastic optimization model was developed to determine optimal testing strategies. The model chooses the optimal testing strategy that maximizes utility (minimizes disutility) of additional system costs due to testing and rejection and allows estimation of the risk premium required for sellers to undertake a dual marketing system with GM/Non-GM segregations over the current Non-GM system. Elements of costs (testing costs, rejection costs, and risk premium) were estimated for a base model representing a grain export chain. The model... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Genetically modified organisms; Biotechnology; Wheat; Risk; Segregation; Identity preservation; Crop Production/Industries. |
| Ano: 2002 |
URL: http://purl.umn.edu/23502 |
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| Miossec, Laurence; Girard, Sophie; Czerwinski, N.. |
| The first national census concerning shellfish culture in France was carried out in 2002. The main purpose was to provide accurate and comprehensive information on the number and structure of the companies using an in depth review of production factors (leases, plants, equipment's, labour and qualifications), and a survey of cultural practices up to the market level. Moreover, the census aimed to quantify the bivalve sales dedicated to consumption and to measure the livestock transfers among rearing shellfish production areas at different developmental stages: spat, intermediate products and fully grown marketable products. The French oyster production reached 109 000 metric tons in 2001. The main production was observed in Poitou-Charentes region... |
| Tipo: Text |
Palavras-chave: Risk; Pathogens; Exotic species; Introduction; Cultural practices; Transfert; France; Oyster aquaculture. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/acte-3316.pdf |
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| Vasconcelos,V.M.. |
| Toxic cyanobacteria are common in Portuguese freshwaters and the most common toxins are microcystins. The occurrence of microcystin-LR (MCYST-LR) has been reported since 1990 and a significant number of water reservoirs that are used for drinking water attain high levels of this toxin. Aquatic animals that live in eutrophic freshwater ecosystems may be killed by microcystins but in many cases the toxicity is sublethal and so the animals can survive long enough to accumulate the toxins and transfer them along the food chain. Among these, edible mollusks, fish and crayfish are especially important because they are harvested and sold for human consumption. Mussels that live in estuarine waters and rivers where toxic blooms occur may accumulate toxins without... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cyanobacteria; Toxins; Risk; Human health; Microcystins; Accumulation. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000300001 |
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| Wilson, James D.. |
| How "default options" should be used in health risk assessment divides the risk analysis profession. Some argue that these should be "hard": set by policy, generally biased to be "health protective" and requiring a substantial body of evidence to replace by decision-specific alternatives. Others argue that they should be science-based, identified by consensus of the professional community, replaced by whatever decision-specific information may be available to the analyst. This paper shows that both positions have validity, and that both are incomplete. Each kind of construct has a useful role to play, but in different kinds of decisions. Because the two are different, we suggest giving them different names, "default option" being assigned to the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Risk; Regulation; Decision making; Default options; EPA; FDA; Science; Policy; Public participation; Risk analysis; Risk and Uncertainty. |
| Ano: 1998 |
URL: http://purl.umn.edu/10712 |
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| Pereira, Paulo Rodrigues Fernandes; Lima, Luiz Carlos Oliveira; Funcke, Andre Luis; Borsoi, Tales Neri; Santos, Rudislei. |
| O agronegócio do Leite desempenha um papel importante dentro do setor agropecuário; todavia, tem sofrido os efeitos das diversas políticas macroeconômicas e setoriais. De forma semelhante, o agronegócio do leite tem relevância para o estado de Rondônia. A característica da produção no Estado está centrada na monocultura familiar de baixa produtividade, donde é possível inferir que os riscos de produção são elevados. Isto posto, esse trabalho teve a finalidade mensurar o quão arriscado é a atividade de uma propriedade rural. Os resultados indicaram que os riscos são de fato bastante elevados; todavia, identificou-se que o fator gerencial é importante para os riscos permaneçam altos, ou seja, decisões gerenciais são capazes alterar esse quadro como elevar... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Leite; Risco; Rondônia; Gestão; Decisão; Milk; Risk; Rondonia; Management; Decision; Agribusiness; Livestock Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/108926 |
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| Registros recuperados: 284 | |
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