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Registros recuperados: 9
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Book Reviews AgEcon
Ancev, Tihomir; Grafton, R. Quentin; Wittwer, Glyn.
Tipo: Journal Article Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2006 URL: http://purl.umn.edu/116923
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Book reviews AgEcon
Vanselow, Barbara; Griffith, Garry R.; Thorpe, Sally; Connors, Tom; Francis, Michael; Brown, Colin G.; Wittwer, Glyn; Zhao, Xueyan.
Tipo: Journal Article Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2001 URL: http://purl.umn.edu/117733
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CGE modelling of the resources boom in Indonesia and Australia using TERM AgEcon
Wittwer, Glyn; Horridge, Mark.
The sharp increase in Australia's terms of trade since 2003-04 has dramatic regional and sectoral implications. Mining-intensive regions have gained from the jump in export prices. Import-competing sectors have faced greater competition both from falling import prices and due to rising demand for domestic factors from the mining sectors. The drought of 2006 will widen the gap between winning and losing regions. In Indonesia, even if we assume that the oil extraction sector is facing resource depletion, a long-run terms-of-trade improvement may result in aggregate consumption increasing should real GDP fall relative to the base case. The TERM framework is highly suitable for modelling Brazil and China, each with around 30 regions.
Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/10433
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Closing the factory doors until better times: CGE modelling of drought using a theory of excess capacity AgEcon
Wittwer, Glyn; Griffith, Marnie.
The aim of this paper is to analyse the regional economic impacts of a prolonged period of recurrent droughts. The model used for analysis is TERM-H2O, a dynamic successor to the bottom-up, comparative static TERM (The Enormous Regional Model). We concentrate on the regions of the southern Murray-Darling basin. Large change simulations are a challenge for modellers. Drought brings substantial inward supply shifts for farm sectors. This paper outlines various theoretical modifications undertaken to improve the modelling of drought in a computable general equilibrium (CGE) framework and then applies them to the period from 2005–06 on. In particular, we apply a theory of sticky capital adjustment to downstream processing sectors, whereby processors...
Tipo: Conference Paper or Presentation Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2010 URL: http://purl.umn.edu/59263
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Dynamic general equilibrium analysis of improved weed management in Australia's winter cropping systems AgEcon
Wittwer, Glyn; Vere, David T.; Jones, Randall E.; Griffith, Garry R..
A recent analysis indicated that the direct financial cost of weeds to Australia’s winter grain sectorwas approximately $A1.2bn in 1998–1999. Costs of thismagnitude represent a large recurring productivity loss in an agricultural sector that is sufficient to impact significantly on regional economies.Using amulti-regional dynamic computable general equilibrium model, we simulate the general equilibrium effects of a hypothetical successful campaign to reduce the economic costs of weeds. We assume that an additional $50m of R&D spread over five years is targeted at reducing the additional costs and reduced yields arising from weeds in various broadacre crops. Following this R&D effort, one-tenth of the losses arising from weeds is temporarily...
Tipo: Article Palavras-chave: CGE modelling; Dynamics; Weed management; Crop Production/Industries.
Ano: 2005 URL: http://purl.umn.edu/118584
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Regional economic impacts of a plant disease incursion using a general equilibrium approach AgEcon
Wittwer, Glyn; McKirdy, Simon; Wilson, Ryan.
The present study uses a dynamic multiregional computable general equilibrium (CGE) model to estimate the micro- andmacroeconomic effects of a hypothetical disease or pest outbreak. Our example is a Karnal bunt incursion in wheat in Western Australia. The extent of the incursion, the impact of the disease or pest on plant yields, the response of buyers, the costs of eradication and the time path of the scenario contribute to outcomes at the industry, regional, state and national levels. We decompose the contribution of these individual direct effects to the overall impact of the incursion. This might provide some guidance regarding areas for priority in attempting to eradicate or minimise the impacts of a disease or pest. The study also introduces a theory...
Tipo: Article Palavras-chave: Crop Production/Industries.
Ano: 2005 URL: http://purl.umn.edu/118438
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THE SENSITIVITY OF WINE INDUSTRY OUTCOMES TO MODEL ASSUMPTIONS IN GST SCENARIOS AgEcon
Wittwer, Glyn.
This study provides an example of applying an AGE model to consider the effects on the wine industry of broader tax reform. The sensitivity of results is considered with respect to the choice of base year for static analysis and an alteration to the long-run capital assumption. Systematic sensitivity analysis is used to evaluate the extent to which expenditure and export demand elasticities determine industry-specific outcomes. The analysis is extended to evaluate the impacts of policy uncertainty.
Tipo: Presentation Palavras-chave: Agribusiness.
Ano: 2000 URL: http://purl.umn.edu/123742
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Water purchases to save the Murray-Darling Basin AgEcon
Wittwer, Glyn.
Murray-Darling Basin communities have suffered recurring and prolonged droughts over the past decade. Now that the rains have returned, these communities see the Sustainable Diversion Limits (SDLs) planned by the Commonwealth as a new threat. Modelling with TERM-H2O assumes that since the SDL process is voluntary, Commonwealth purchases will proceed slowly over the next 12 years. This gives farmers time to utilize water saving technologies as they emerge. This is in contrast to the relatively rapid purchase of 920 GL up until September 2010 that has already occurred. These relatively rapid sales reflect hardship associated with drought. If the Commonwealth is to reach the 3500 GL target, it may need to pay over $4 billion more to farmers for water (2010...
Tipo: Conference Paper or Presentation Palavras-chave: Environmental Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/100733
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Who gains from Australian generic wine promotion and R&D? AgEcon
Zhao, Xueyan; Anderson, Kym; Wittwer, Glyn.
The present paper estimates the distributions of aggregate returns from different types of research and promotion investments by the Australian grape and wine industry among grapegrowers, winemakers, domestic and foreign consumers, and the tax office. The results show that most of the gains from cost-reducing R&D in grape and wine production go to producers and that producers get a far larger share of the benefit from export promotion than that from domestic promotion. Foreign consumers of Australian wine also enjoy a significant share of the benefits from Australian R&D. Sensitivity analysis shows that the key results hold for a wide range of parameter values.
Tipo: Journal Article Palavras-chave: Marketing; Research and Development/Tech Change/Emerging Technologies.
Ano: 2003 URL: http://purl.umn.edu/116187
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