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| Registros recuperados: 33 | |
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| Kingwell, Ross S.. |
| Private and many publicly funded plant breeding organisations charge farmers for use of varieties they develop. This article compares four alternative charging mechanisms and outlines responses to these alternatives by farmers and plant breeders. Risk‐averse farmers and breeders are shown to have opposite preferences for charging mechanisms. Results suggest profit‐based or royalties are preferred by farmers whereas breeders prefer area or tonnage‐based royalties. Risk‐sharing arrangements between both parties could lead to an overall preference for profit‐based or royalties. However, this finding is subject to important caveats and practical limitations. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries; Resource /Energy Economics and Policy. |
| Ano: 2001 |
URL: http://purl.umn.edu/117468 |
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| Pannell, David J.; Kingwell, Ross S.; Schilizzi, Steven. |
| Bugs are an unavoidable aspect of mathematical programming (MP) modelling. In this paper we discuss the prevention and diagnosis of bugs in MP models. The topic is rarely addressed in the literature but is crucial to the success of modelling projects, especially for large models. We argue that finding a bug and understanding unexpected results (whether or not due to a bug) are very closely related activities. We identify different types of bugs and suggest practical strategies for dealing with each. Adopting procedures for prevention of bugs is essential, especially for large models. We outline the prevention strategies we have adopted and found successful for the MIDAS and MUDAS models. |
| Tipo: Journal Article |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 1996 |
URL: http://purl.umn.edu/12306 |
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| Kingwell, Ross S.. |
| Modern farming in Australia is no longer simple. Farms are large, multi-enterprise businesses underpinned by expensive capital investments, changing production technologies, volatile markets and pervasive regulation. The complexity of modern broadacre farming leads to the question: what is the nature of the relationship between farm business complexity and farm profitability? This study uses bioeconomic farm modelling and employs eight measures of complexity to examine the profitability and complexity of a wide range of broadacre farming systems in Australia. Rank order correlations between farm profitability and each measure of complexity show inconsistent relationships, although the most profitable farming systems are found to be reasonably complex on... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Complexity; Farm modelling; Management; Profitability; Farm Management. |
| Ano: 2010 |
URL: http://purl.umn.edu/59090 |
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| Kingwell, Ross S.. |
| This paper uses variance decomposition modelling to explore how wheat revenue volatility in Australia has changed spatially and temporally. The components of revenue variance are the variances and covariances of wheat prices, the area of wheat harvested and the yield of wheat. The key finding is that the volatility of wheat revenue (detrended) has more than doubled in every main wheat-growing State in Australia over the last 15 years or so Changes in wheat areas are mostly a minor source of revenue variance. The principal cause of volatility is yield changes with price changes increasing slightly in absolute importance when compared to their adjacent previous period. Greater downside yield risk is often the principal cause of the increased yield variance.... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Risk; Wheat production; Variance decomposition; Wheat farming; Agribusiness. |
| Ano: 2011 |
URL: http://purl.umn.edu/100572 |
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| Browne, Natalie; Kingwell, Ross S.; Behrendt, Ralph; Eckard, Richard. |
| Dryland farming is commonplace in Australia so the profitability of dryland farms often depends on the amount and timing of rainfall. With drier weather conditions featuring in climate change projections for southern Australia, it is important to understand the relationships between rainfall, commodity prices and farm profitability. Using correlated farm commodity and input prices from the past nine years, farm profitability was calculated for a range of farm types in southwest Victoria under low, average and high rainfall scenarios. Fourteen representative farms were examined that included production of Merino fine wool, prime lamb, beef cattle, milk, wheat and canola. This paper compares and contrasts the spread of profitability of these farms against... |
| Tipo: Working Paper |
Palavras-chave: Dryland farming; Farm enterprises; Climate change; Price variability; Crop Production/Industries; Environmental Economics and Policy; Livestock Production/Industries. |
| Ano: 2012 |
URL: http://purl.umn.edu/124249 |
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| Kingwell, Ross S.. |
| The salinisation of farmland in Australia is a major natural resource management problem. Over the next 20 years a further 1.1 million hectares of broadacre farmland is predicted to become salt-affected. This paper firstly explores the spatial ramifications of the spread of salinity in Australia's agricultural regions. Some of the nation's most profitable grain growing regions will become seriously affected by salinity over the next 20 years. Secondly this paper outlines the nature, uptake and profitability of various salinity management options available to Australian farmers. These options include preventative and containment measures, such as engineering solutions and adoption of deep-rooted perennials, and other options involving adaptation to more... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm Management. |
| Ano: 2003 |
URL: http://purl.umn.edu/24391 |
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| Anderton, N.; Kingwell, Ross S.. |
| Ethanol production is increasingly commonplace in many grain producing regions. This paper uses the grain producing region of Western Australia as a case study to illustrate how the location and size of an ethanol plant affects its grain accumulation costs. Specifically, this study examines how price variability of various wheat grades, combined with spatial and temporal variability in production of those grades affects the costs of grain accumulation for ethanol production. These costs are the main component of a plant's operating costs so lessening these costs can offer a comparative advantage for a plant owner. Logistics models' based on mathematical programming were constructed to depict a range of plant sizes and locations for ethanol production. The... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Ethanol; Mathematical programming; Logistics; Wheat; Grain quality; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/10349 |
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| Kingwell, Ross S.; Harris-Adams, Keely. |
| If agriculture is included in an Australian emissions trading scheme then it may face from 2015 at the earliest, a price for its greenhouse gas emissions; and thereby have incentives to offset and lessen its emissions. Yet because there is currently little understanding of the spatial pattern of emissions in agricultural regions of Australia, the extent of the challenge the sector faces in reducing its emissions is not fully recognised. To improve our understanding, this study uses the National Greenhouse Accounts methodology to estimate the spatial and temporal patterns of agricultural emissions since 1990 in the key agricultural region in Australia’s southwest. This region generates almost 40 percent of the nation’s winter crop production and supports... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Greenhouse gas emissions; Spatial analysis; Agriculture; Offsets; Sequestration. |
| Ano: 2009 |
URL: http://purl.umn.edu/48161 |
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| Kingwell, Ross S.; Metcalf, Tess. |
| The Australian government is introducing a Carbon Pollution Reduction Scheme in 2010, as part of its climate change policy. After 2015 agriculture may be covered by this scheme. This paper examines how different broadacre farming systems may be affected by the policy settings of this scheme. Using the bio-economic farming systems model MIDAS (Model of an Integrated Dryland Agricultural System) the impacts of the Carbon Pollution Reduction Scheme on the profitability of different broadacre farming systems in the southwest of Australia are investigated. Results show a range of profit and enterprise impacts across the various farm types. In a scenario where agriculture is not covered by the scheme, reductions in profit range from 7 to 12 percent, attributable... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agriculture; Greenhouse gases; Economic modelling; Abatement. |
| Ano: 2009 |
URL: http://purl.umn.edu/48162 |
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| Kingwell, Ross S.. |
| A discrete stochastic programming model of the farming system of the eastern wheatbelt of Western Australia is used to examine the effect of tactical responses and risk aversion on wheat supply. Including within-season tactical changes to wheat areas decreases the own-price elasticity of supply. By contrast, introducing risk aversion has no consistent effect on the own-price elasticity of supply. The implications for supply models are discussed. |
| Tipo: Journal Article |
Palavras-chave: Demand and Price Analysis. |
| Ano: 1995 |
URL: http://purl.umn.edu/12393 |
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| Bennett, Anne L.; Edward, Alex; Herbert, Allan; Kingwell, Ross S.; Peak, Caroline; Rodgers, David. |
| Future prosperity of farming businesses depends not only on immediate prospects, but also on the capability to adapt to changing circumstances. In looking to the future, farm managers need to assess where the current farming system is taking them, and whether changing to an alternative farming system might be more profitable. There are various techniques for assessing the profitability of alternative farming systems, but frequently the cost of transition is overlooked. The financial consequences of transition to a new farming system are assessed for two case study farms using a spreadsheet tool (STEP), developed by the authors. The tool assists farm managers in assessing the risk of transition strategies as well as comparing rotations. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm Management. |
| Ano: 2003 |
URL: http://purl.umn.edu/57834 |
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| Brennan, John P.; Kingwell, Ross S.; Thomson, Fiona M.; Cullis, Brian R.. |
| In undertaking cultivar trials, the variability of the response of the cultivars to the different environments in which they are grown introduces the possibility of release errors and non‐release errors in the decisions made on the basis of the trial results. In this article a model is developed that accounts for the economic costs of those errors as well as the costs of operating the trials, and enables the features of the optimal cultivar testing program to be identified. The model is illustrated by application to wheat cultivar trials in central and southern NSW. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1998 |
URL: http://purl.umn.edu/117231 |
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| Rose, Gus; Kingwell, Ross S.. |
| Labour scarcity and affordability have encouraged many farmers in Western Australia to focus more on cropping than sheep production. Many farmers are opting to run low input livestock systems. This paper examines labour demand for sheep and cropping during the production year, combined with various scenarios of labour availability and cost. The implications for farm profitability and enterprise selection are examined using the bio-economic farming systems model MIDAS (Model of an Integrated Dryland Agricultural System). Labour requirements for sheep are far greater than those for cropping. Additionally the labour requirements for sheep are high in all production periods whilst the seasonal nature of cropping means more time is required only at certain... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agriculture; Labour; Farm modelling; Cropping; Sheep. |
| Ano: 2009 |
URL: http://purl.umn.edu/47947 |
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| Nath, Tanmoy; Kingwell, Ross S.; Cunningham, Peter; Islam, Nazrul; Xayavong, Vilaphonh; Curtis, Kimbal; Feldman, David; Anderton, Lucy; Mahindua, Truphena. |
| Western Australia (WA) supplies around three-quarters of Australia’s exports of live sheep. The number of sheep exported live from WA has ranged from 4.5 million to 2.4 million with the trend in numbers exported being downwards. The future of this export trade appears to be increasingly vulnerable and uncertain, primarily because of the influence of animal welfare lobbyists. This paper uses scenario analysis to assess the impact on WA’s sheep supply chain of the termination of the live sheep export trade. The supply chain comprises three subsectors: farm production, processing/wholesale and retailing/export. The impacts of the trade termination on each of these sub-sectors are reported. These impacts are strongly linked to how producers respond to... |
| Tipo: Presentation |
Palavras-chave: Live sheep export; Animal welfare; Regional economic impacts; Industry value chains; International Relations/Trade; Livestock Production/Industries. |
| Ano: 2012 |
URL: http://purl.umn.edu/124345 |
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| Kingwell, Ross S.. |
| Commercial export from Australia of native birds, wild or captive bred, is prohibited. This paper firstly describes the current legislation and regulations that restrict the export of native birds and discusses why governments have adopted such a regulatory approach to bird species preservation. Secondly, the paper reviews the debate concerning the export ban, pointing out strengths and weaknesses in arguments and indicating the important role of CITES. Lastly, the paper outlines a new case for a conditional lifting of the ban, whereby DNA fingerprinting is used to establish transferable property rights to overcome a main source of market failure in the preservation of bird species. Application of this DNA technology offers an opportunity both to protect... |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1994 |
URL: http://purl.umn.edu/12487 |
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| Registros recuperados: 33 | |
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