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| Registros recuperados: 18 | |
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| Brennan, Donna C.. |
| Farmers in developing countries have limited opportunities for borrowing to even out variability associated with risky farm income, but they can save. A dynamic programming model of savings is presented in the current paper which examines optimal savings strategies for farmers, using a case study of integrated rice-shrimp farms in Vietnam. It is shown that when savings are accounted for, the expected utility ranking of different risky farm choices may not differ that much between farmers with different levels of risk aversion. |
| Tipo: Article |
Palavras-chave: Farm Management; Risk and Uncertainty. |
| Ano: 2002 |
URL: http://purl.umn.edu/118593 |
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| Tapsuwan, Sorada; Ingram, Gordon; Brennan, Donna C.. |
| Up to 60% of potable water supplied to Perth in Western Australia is extracted from the Gnangara mound. Many of the urban wetlands above the Mound are groundwater-dependent. Excessive groundwater extraction and climate change have resulted in a decline in water levels in the wetlands. This study estimates the value of urban wetlands in three local government districts in the Perth metropolitan region using the hedonic property price approach. Preliminary results found that proximity to wetlands influences the sales prices of properties. The marginal implicit price of reducing the distance to the nearest wetland by 1 metre, evaluated at the mean sales value, is AU$463. If there is more than one wetland within 1.5 kilometres of a property, the second wetland... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Groundwater; Housing development; Aquifer; Marginal implicit price; Land Economics/Use. |
| Ano: 2007 |
URL: http://purl.umn.edu/10418 |
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| Clayton, Helena; Brennan, Donna C.. |
| In recent years, the growth and intensification of shrimp aquaculture in Asia has been explosive. Asia reportedly produces nearly eighty per cent of the world's total farmed shrimp output. With strong demand and high world prices, along with declining wild shrimp stock, shrimp aquaculture in Asia, particularly in coastal regions, is becoming an increasingly important source of income and employment. In Vietnam, shrimp aquaculture is now one of the most important aquaculture practices in terms of area, production, employment and foreign exchange generation. In the coastal regions of the Mekong Delta, where most of the shrimp aquaculture is practised, saline intrusion in the dry season often limits rice production to just one wet season crop per year. The... |
| Tipo: Presentation |
Palavras-chave: Livestock Production/Industries. |
| Ano: 1999 |
URL: http://purl.umn.edu/123794 |
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| Brennan, Donna C.; Petersen, Elizabeth H.; Que, Nguyen Ngoc; Vanzetti, David. |
| Vietnam has achieved remarkable economic growth since it liberalised its markets, and further economic growth and opportunities are predicted both within and outside the agriculture sector. However, growth has not been evenly distributed across regions and significant structural adjustment pressures are expected in the medium to long term. A dynamic, eight region, 13 commodity, non-linear programming model of Vietnam’s agricultural sector is used to analyse the likely impact of a change in rural-urban migration on agricultural production, prices, trade and regional incomes. |
| Tipo: Presentation |
Palavras-chave: Community/Rural/Urban Development. |
| Ano: 2012 |
URL: http://purl.umn.edu/124405 |
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| Brennan, Donna C.. |
| In this paper, it is argued that removing restrictions on road transport will not be sufficient to encourage efficiency improvements in grain freight industry while rail authorities continue to operate as public monopolies. This is because of the structure of costs in the grain freight industry, which imply that road transport cannot compete with rail transport in areas where road is the more efficient mode. While the tendency for a regulated monopoly to cross-subsidise inefficient operations is common place, the focus in this analysis is on the nature of the cross-subsidy in the grain freight industry, and shows that it is a type of cross-subsidy that is well hidden by aggregation. A model of investment in a rail network is presented where the monopoly... |
| Tipo: Journal Article |
Palavras-chave: Public Economics. |
| Ano: 1995 |
URL: http://purl.umn.edu/22401 |
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| Brennan, Donna C.. |
| The nature of the seasonal water market is examined using a theoretical model and empirical evidence from the Victorian market. Drivers of the seasonal opportunity cost of water include the underlying nature of investment in the industry made in the context of risky entitlement yields; and the timing and nature of information regarding seasonal water availability and rainfall. Seasonal water markets facilitate the reallocation of water availability according to this short-run opportunity cost. Evidence from the market suggests that transactions costs are low and most of the existing constraints to trade in seasonal allocations are the result of hydrological conditions. Analysis of market data suggests that the price response of the market to water... |
| Tipo: Journal Article |
Palavras-chave: Irrigation; Water markets; Water policy reform; Resource /Energy Economics and Policy. |
| Ano: 2006 |
URL: http://purl.umn.edu/116976 |
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| Clayton, Helena; Brennan, Donna C.. |
| This paper explores the economics of land degradation in the rice-shrimp system in the Mekong Delta of Vietnam. A bioeconomic NPV model was developed to evaluate and compare the long-term benefits of alternative production choices and farm technologies. There is an alternative rice-shrimp technology emerging in Vietnam that does not have the same land degrading impacts as the 'traditional' system, however the high capital outlay and risk associated with such technology presents its own problems. In the paper the economic incentives for adoption of the non-land degrading rice-shrimp technology are explored. Conclusions are drawn with regard to the opportunity cost of land degradation and technological change. Some conclusions are also provided on the policy... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Land degradation; Technological change; Vietnam; Environmental Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/57845 |
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| Brennan, Donna C.. |
| In this paper, a model is presented which shows the relationship between country grain storage costs and transport bottlenecks that exist in the harvest period. It is shown that transport bottlenecks limit the amount of grain that can be transported from receival points in the peak receival period. This constraint means that the cost of operating country receival points is high because the turnover of storage capacity is limited. However, system costs can be reduced by focusing the peak transport task at sites that are less intensive users of scare transport capacity. This allows more grain to be transported out of the system in the peak period, decreasing the need for costly long term storage at country sites. In the longer term, differences in the... |
| Tipo: Journal Article |
Palavras-chave: Public Economics; Research Methods/ Statistical Methods. |
| Ano: 1994 |
URL: http://purl.umn.edu/22734 |
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| Heaney, Anna; Beare, Stephen; Brennan, Donna C.. |
| The regulation of river systems to meet water demands for irrigation in the southern Murray Darling Basin has changed the timing and the volume of the natural pattern of flows. Australian governments have committed to restoring, in part, winter and spring flow regimes to preserve and enhance the riverine environment. These changes will involve trade-offs against the foregone returns to agriculture and between different environmental objectives. To better understand these trade-offs, environmental flow objectives are specified as a change in the inter-arrival time distributions of winter and spring flow events, ranging from brief flooding events to the inundation of flood plains and wetlands over several weeks. Expected costs, and hence the trade-offs,... |
| Tipo: Presentation |
Palavras-chave: Environmental Economics and Policy; Risk and Uncertainty. |
| Ano: 2012 |
URL: http://purl.umn.edu/124315 |
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| Brennan, Donna C.; Tapsuwan, Sorada; Ingram, Gordon. |
| Outdoor water restrictions are usually implemented as bans on a particular type of watering technology (sprinklers), which allow households to substitute for labour-intensive (hand-held) watering. This paper presents a household production model approach to analysing the impact of sprinkler restrictions on consumer welfare and their efficacy as a demand management tool. Central to our empirical analysis is an experimentally derived production function which describes the relationship between irrigation and lawn quality. We demonstrate that for a typical consumer complete sprinkler bans may be little more effective than milder restrictions policies, but are substantially more costly to the household. |
| Tipo: Journal Article |
Palavras-chave: Household model; Urban water demand; Urban water restrictions; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/118331 |
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| Brennan, Donna C.. |
| In this paper, the literature on the economics of grain distribution systems is reviewed. The emphasis of this review is on farm to port issues and largely excludes port and shipping issues. In the first part of the paper, the discussion centres on the historical institutional environment in Australia, which was heavily regulated. The second part of the paper highlights some of the issues relating to the pricing of central grain distribution services that continue to exist even in the more competitive environment which has emerged in the 1990's. The scope for future agricultural economics research in this area is discussed. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1995 |
URL: http://purl.umn.edu/12472 |
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| Brennan, Donna C.. |
| The opportunity cost of water in the irrigation industry is a contentious issue at present because of the commitment made by the State and Commonwealth governments to get water out of the irrigation industry for environmental flows. The estimated value of the opportunity cost will affect farmers' claims for compensation. Variation in the opportunity cost over space and the functioning of the spatial market will determine whether the efficiency costs of a simple across the board reduction in rights can be mitigated by trade or whether strategic buy back of water is required. The extent of variation in the opportunity cost of water according to seasonal conditions will affect the cost of flow policies that impact on the reliability of rights. To date, most... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Demand and Price Analysis; Resource /Energy Economics and Policy. |
| Ano: 2004 |
URL: http://purl.umn.edu/58375 |
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| Brennan, Donna C.. |
| The potential for improving irrigation scheduling decisions and adoption of more efficient irrigation systems is explored using a bioeconomic simulation model of lettuce production on the Gnangara Mound near Perth, Western Australia. Sandy soils with poor water and nutrient holding capacity are associated with declining marginal productivity of water at high water use, which would create an incentive to reduce water use and to adopt closer sprinkler spacing if farmers had correct information about the declining marginal productivity of water. Incorrect perceptions regarding water–yield relationships lead to over use of water by up to 50 per cent and reduce profits by $475 per crop hectare (12 per cent) in the short run, and remove the incentive to adopt... |
| Tipo: Journal Article |
Palavras-chave: Bioeconomic models; Horticulture; Irrigation; Technology adoption; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/118335 |
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| Brennan, Donna C.. |
| The environmental consequences of shrimp farming in Asia have caused widespread public concern. One of the main environmental impacts is the high nutrient load that is discharged from ponds, as part of the management routine aimed at maintaining pond water quality. In Australia, where there is a high level of community awareness of the problems associated with eutrophication, the Environmental Protection Agencies are faced with the difficult task of determining effluent control policies for the emerging prawn industry. According to the standard environmental economic arguments relating to the design of pollution control instruments, the choice of the best policy instrument depends upon the nature of the pollution problem, the costs of abatement, and the... |
| Tipo: Presentation |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 1999 |
URL: http://purl.umn.edu/123774 |
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| Brennan, Donna C.; Scoccimarro, Michelle. |
| This article discusses the key practical issues associated with defining property rights to water use, in the context of broadening the scope of the market for transferable water entitlements. In particular, the third party impacts of water trade and the need for improved water trading rules are discussed. Some of the issues associated with defining the reliability of water rights, including the design of appropriate dam management policies, are also discussed. The article concludes with some positive suggestions for the policy debate. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1999 |
URL: http://purl.umn.edu/117032 |
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| Brennan, Donna C.; Lindner, Robert K.. |
| Fluctuating annual harvest volumes create a peak load problem in the provision of grain storage capacity. There are a number of technologies for handling and storing grain, ranging from capital intensive to labour intensive methods. Optimal provision of grain storage capacity can therefore be analysed in the framework of the conventional peak load pricing model. An investment model of grain storage is outlined and the optimal technology choices are determined according to simple investment roles. Capacity of the more capital intensive storage types should be only provided if the extra capital cost is justified by the saving in operating costs, which depends on the expected utilisation of storage. Some level of supply failure is justifiable. An examination... |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries; Production Economics. |
| Ano: 1991 |
URL: http://purl.umn.edu/22763 |
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| Registros recuperados: 18 | |
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