Consulta: creatorFacets:"Pannell,   David J."
Registros recuperados: 66
Data/hora: 12/06/2024 14:47:23

Combinatorial optimisation of a large, constrained simulation model: an application of compressed annealing
Provedor de dados: 31
Autores: Doole,   Graeme J.; Pannell,   David J.
Simulation models are valuable tools in the analysis of complex, highly constrained economic systems unsuitable for solution by mathematical programming. However, model size may hamper the efforts of practitioners to efficiently identify the most valuable configurations. This paper investigates the efficacy of a new metaheuristic procedure, compressed annealing, for the solution of large, constrained systems. This algorithm is used to investigate the value of incorporating a sown annual pasture, French serradella (Ornithopus sativa Brot. cv. Cadiz), between extended cropping sequences in the central wheat belt of Western Australia. Compressed annealing is shown to be a reliable means of considering constraints in complex optimisation problems in...
Tipo: Conference Paper or Presentation
Palavras-chave: Combinatorial optimisation; Crop rotation; Simulated annealing; Research Methods/ Statistical Methods; C63; Q15.
Ano: 2007
URL: http://purl.umn.edu/10438

Economic evaluation of a weed-activated sprayer for herbicide application to patchy weed populations
Provedor de dados: 31
Autores: Bennett,   Anne L.; Pannell,   David J.
Spatial distribution of weeds in a crop is patchy. Traditional boom sprayers waste herbicide by applying it to areas where weed density is already low. A new technology, Weed Activated Spray Process (WASP), uses sensors to detect the presence of weeds and control spray nozzles accordingly. The economic benefits of this technology to extensive crop farmers in Western Australia are investigated using a model based on the economics of information. Existing technology is likely to reduce profits because the weed density at which it switches off spraying is too high. Even if sensitivity to low densities could be improved, likely benefits of pre‐crop usage would still be very low or negative.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 1998
URL: http://purl.umn.edu/117284

AN ECONOMIC RESPONSE MODEL OF HERBICIDE APPLICATION FOR WEED CONTROL
Provedor de dados: 31
Autores: Pannell,   David J.
A biologically realistic model of crop yield response to herbicide application is presented. It includes functions for weed mortality from herbicide application and yield loss due to surviving weeds. The optimal herbicide rate and two types of decision thresholds are derived theoretically and illustrated with empirical examples. Responses of the various decision criteria to changes in parameters are also examined theoretically and empirically. A multidimensional threshold for weeds based on weed density and weed-free yield is presented. The issue of farmers using other than officially recommended herbicide rates is discussed.
Tipo: Journal Article
Palavras-chave: Risk and Uncertainty.
Ano: 1990
URL: http://purl.umn.edu/22352

Debugging Mathematical Programming Models: Principles and Practical Strategies
Provedor de dados: 31
Autores: 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

Book reviews
Provedor de dados: 31
Autores: Herrmann,   Roland; Anderson,   Jock R.; Godden,   David P.; Davenport,   Scott V.; Pannell,   David J.; Trapnell,   Lindsay N.
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2001
URL: http://purl.umn.edu/117377

Institutional Impediments to Groundwater Trading: the case of the Gnangara groundwater system of Western Australia
Provedor de dados: 31
Autores: Skurray,   James H.; Pandit,   Ram; Pannell,   David J.
The development of a market in groundwater usage rights can be inhibited by constraints arising from the institutional context. Such impediments may reduce the potential gains from trade and may generate high transaction costs for prospective traders.  We analyse the regulations and policies influencing groundwater transfers in a case-study area -- the Gnangara groundwater system around Perth, Western Australia -- and identify significant impediments to a groundwater market.  Property rights are found to be conditional, temporary, and vulnerable to amendment. Regulatory approval is required for all transfers. Facilitating infrastructure is lacking, and price information is unavailable. Management area boundaries reflect land ownership and use rather than...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy; Environmental Economics and Policy; Institutional and Behavioral Economics; Land Economics/Use; Political Economy; Public Economics; Resource /Energy Economics and Policy; Q15; Q25; Q28; Q38; Q56; Q57; Q58; D02; R52; H41; H23; H11; D23; D47; D78; H44.
Ano: 2011
URL: http://purl.umn.edu/117825

Effective information and the influence of an extension event on perceptions and adoption
Provedor de dados: 31
Autores: Llewellyn,   Rick S.; Lindner,   Robert K.; Pannell,   David J.; Powles,   Stephen B.
Perceptions are known to play an important role in the innovation adoption decision. Once influential perceptions have been identified, there is the potential for information to influence adoption by changing these perceptions. In this paper, the influence of an extension workshop targeting grain growers’ perceptions known to be associated with the adoption of integrated weed management and herbicide resistance management has been measured using regression analysis. Consistent with a Bayesian learning framework, the greatest influence on grower perceptions and intended adoption behaviour was observed where information could be delivered with a high degree of certainty and validity.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries; Farm Management.
Ano: 2003
URL: http://purl.umn.edu/57911

Economic analysis of integrated weed management strategies for annual barnyardgrass (Echinochloa crus-galli complex) in Philippine rice farming systems
Provedor de dados: 31
Autores: Beltran,   Jesusa C.; Pannell,   David J.; Doole,   Graeme J.; White,   Benedict.
This paper describes a dynamic simulation model that has been developed to provide a comprehensive assessment of integrated weed management programmes for the control of annual barnyardgrass (Echinochloa crus-galli complex) in Philippine rice farming systems. The main outputs of the model include weed seed and plant densities and seasonal and annualised profit over the simulated planning horizon. Model output emphasises the substantial economic benefits associated with effective long-term weed management strategies. In addition, a mixture of chemical and non-chemical treatments provides good weed control in rice crops, and maximises long-term profit for systems where the main weed is annual barnyardgrass. However, the performance of this strategy is...
Tipo: Presentation
Palavras-chave: Barnyardgrass; Bioeconomic model; Integrated weed management; Rice farming systems.; Crop Production/Industries.
Ano: 2012
URL: http://purl.umn.edu/124236

Lessons from implementing INFFER with regional catchment management organisations
Provedor de dados: 31
Autores: Marsh,   Sally P.; Curatolo,   April; Pannell,   David J.; Park,   Geoff; Roberts,   Anna M.
Investment in natural resource management (NRM) by regional organisations in Australia has been widely criticised for failing to achieve substantial environmental outcomes. The Investment Framework for Environmental Resources (INFFER) is a tool for developing and prioritising projects to address environmental issues such as water quality and biodiversity decline, environmental pest impacts and land degradation. It aims to achieve the most valuable environmental outcomes with the available resources. During 2008 and 2009 INFFER has been implemented with a number of catchment management organisations (CMOs) throughout Australia. In this paper, we report on lessons from and implications of this experience. Data on implementation were collected in formal and...
Tipo: Conference Paper or Presentation
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2010
URL: http://purl.umn.edu/59100

Agricultural extension policy in Australia: the good, the bad, and the misguided
Provedor de dados: 31
Autores: Marsh,   Sally P.; Pannell,   David J.
In most states of Australia, agricultural extension policies and practices have increasingly been based on considerations of private/public goods, user pays and cost recovery. In addition, the delivery of extension has been strongly influenced by changing administrative structures and a change in the paradigm within which the extension community operates. These changes have had major impacts, including more extension being delivered by the private sector. There are positive aspects to the changes and, for some issues, they are appropriate. However, we have a number of reservations, particularly about the effectiveness of current extension systems in assisting the adoption of complex environmental and farming system technologies.
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2000
URL: http://purl.umn.edu/117854

UTILITY-EFFICIENT PROGRAMMING FOR WHOLE-FARM PLANNING
Provedor de dados: 31
Autores: Hardaker,   J. Brian; Patten,   Louise H.; Pannell,   David J.
A programming technique, utility-efficient programming, is developed for farm planning under risk. The objective function is the parametric sum of two parts of the utility function in which the degree of risk aversion varies systematically with the parameter. This technique has several advantages over those previously available: a number of types of utility functions are applicable including ones exhibiting decreasing risk aversion; the degree of risk aversion can be limited to a plausible range; the form of the distribution for activity net revenues is flexible; and the technique can be used with available algorithms. The method is illustrated using a parametric linear programming algorithm.
Tipo: Journal Article
Palavras-chave: Farm Management; Risk and Uncertainty.
Ano: 1988
URL: http://purl.umn.edu/22959

Weed Management: A Review of Applied Economics Research in Australia
Provedor de dados: 31
Autores: Pannell,   David J.
Australian research into the economics of privately and publicly funded weed control is reviewed. Of the published studies that consider farm-level problems, most have been simplistic. Complexities which affect a farmer's optimal control strategies for crop and pasture weeds are outlined. The determination of herbicide rates on an economic basis is proposed as an area for further work. The traditional economic threshold concept is not suitable for this purpose. Studies of the economics of public weed control programs are slightly more common than farm-level studies in the literature, although work on public weed problems has focussed on just a few weed species. Future directions for weed economics research are suggested.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 1988
URL: http://purl.umn.edu/12278

Policies and politics: Challenges and opportunities for agricultural and resource economists
Provedor de dados: 31
Autores: Pannell,   David J.
This is a broad-ranging discussion of the role of economics and economists in the formation of government policies. The focus is on helping economists who wish to be influential in the policy process. The paper covers rationales for and against economist involvement in the policy process (market failure, government failure, economist failure), a range of theories that attempt to explain aspects of the policy process, and practical advice and insights based on the experiences of policy economists. Many challenges are highlighted, but some clear opportunities are apparent, particularly through explicit advocacy for the public interest.
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural and Food Policy; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Political Economy; Resource /Energy Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/98514

More Reasons Why Farmers Have So Little Interest in Futures Markets
Provedor de dados: 31
Autores: Pannell,   David J.; Hailu,   Getu; Weersink,   Alfons; Burt,   Amanda.
The use by farmers of futures contracts and other hedging instruments has been observed to be low in many situations, and this has sometimes seemed to be considered surprising or even mysterious. We propose that it is, in fact, readily understandable and consistent with rational decision making. Standard models of the decision about optimal hedging show that it is negatively related to basis risk, to quantity risk, and to transaction costs. Farmers who have less uncertainty about prices have a lower optimal level of hedging. If a farmer has optimistic price expectations relative to the futures market, the incentive to hedge can be greatly reduced. And finally, farmers who have low levels of risk aversion have little to gain from hedging in terms of risk...
Tipo: Working or Discussion Paper
Palavras-chave: Hedging; Risk; Risk aversion; Flat payoff functions; Agricultural Finance.
Ano: 2007
URL: http://purl.umn.edu/9232

Economics of Controlling Invasive Species: A Stochastic Optimisation Model for a Spatial-Dynamic Process
Provedor de dados: 31
Autores: Chalak,   Morteza; Pannell,   David J.; Polyakov,   Maksym.
Invasive species are significant threats to biodiversity, natural ecosystems and agriculture leading to large worldwide economic and environmental damage. Spread and control of invasive species are stochastic processes with important spatial dimensions. Most economic studies of invasive species control ignore spatial and stochastic aspects. This paper covers this gap in the previous studies by analysing a spatially explicit dynamic process of controlling invasive species in a stochastic setting. We show how stochasticity, spatial location of infestation and control can influence the spread, control efficiency and optimal control strategies. The main aim of this paper is to analyse the relationship between economic parameters and stochastic spatial...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy; Land Economics/Use.
Ano: 2011
URL: http://purl.umn.edu/115513

REFLIST: A Program to Assist in Preparation of Reference Lists in Theses and Journal Articles
Provedor de dados: 31
Autores: Pannell,   David J.
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1989
URL: http://purl.umn.edu/12446

Dryland salinity: economic, scientific, social and policy dimensions
Provedor de dados: 31
Autores: Pannell,   David J.
A broad range of information relevant to salinity is reviewed in order to critically evaluate existing and prospective policy responses. The review includes issues of hydrogeology, farmer perceptions and preferences, farm‐level economics of salinity management practices, spill‐over benefits and costs from salinity management, and politics. The technical challenge of preventing salinity is far greater than previously recognised. The farm‐level economics of currently available management practices for salinity prevention are adverse in many situations. Off‐site benefits from on‐farm practices are often small and long delayed. Past national salinity policies have been seriously flawed. While current policy proposals include positive elements, they have not...
Tipo: Journal Article
Palavras-chave: Land Economics/Use.
Ano: 2001
URL: http://purl.umn.edu/117725

Book reviews
Provedor de dados: 31
Autores: Musgrave,   Warren F.; McLaren,   Donald; Eckersley,   Peter; Schilizzi,   Steven; Watson,   Alistair S.; Pannell,   David J.; Marshall,   Graham R.; Mallawaarachchi,   Thilak.
Tipo: Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2002
URL: http://purl.umn.edu/118629

Integrated assessment of public investment in land-use change to protect environmental assets in Australia
Provedor de dados: 31
Autores: Pannell,   David J.; Roberts,   Anna M.; Park,   Geoff; Curatolo,   April; Marsh,   Sally P.; Alexander,   Jennifer.
This is a pre-publication version of: Pannell, D.J., Roberts, A.M., Park, G., Alexander, J., Curatolo, A. and Marsh, S. (2012). Integrated assessment of public investment in land-use change to protect environmental assets in Australia, Land Use Policy 29(2): 377-387.
Tipo: Working or Discussion Paper
Palavras-chave: Environmental Economics and Policy; Resource /Energy Economics and Policy; Q20; Q50.
Ano: 2011
URL: http://purl.umn.edu/102455

On the balance between strategic-basic and applied agricultural research
Provedor de dados: 31
Autores: Pannell,   David J.
Strategic‐basic research refers to basic research conducted in strategically selected areas expected to be of social benefit. Recent literature on the processes of basic research and its links to applied research has not been widely discussed in relation to agricultural research. This may have important implications for the question of the optimal allocation of research resources. The links are reviewed and combined into a framework for considering the allocation question. A numerical model suggests that only a small number of the model’s parameters substantially affect the optimal level of basic research, and that it is not important to identify the optimal solution precisely, since the benefit function is extremely flat around the optimum.
Tipo: Journal Article
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 1999
URL: http://purl.umn.edu/117033

Using Incentives to Buy Land-Use Change in Agriculture for Environmental Benefits
Provedor de dados: 31
Autores: Pannell,   David J.
In general, the use of incentive payments to landholders in environmental programs is poorly thought through. This article discusses situations where environmental incentive payments are more likely to be a cost-effective response by environmental funders. It is proposed that incentives can be used in two broad ways: to encourage trialling of new practices by landholders, or to compensate landholders for losses resulting from land-use changes. It appears that environmental funders often do not pay sufficient attention to the differences between these two approaches. The first approach only makes sense if the new practices are 'adoptable', and so are expected to remain attractive to landholders beyond the trialling phase. The importance of adoptability and...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental subsidies; Incentives; Externalities; Adoption of innovations; Environmental policy; Environmental Economics and Policy; Land Economics/Use; Q24; Q28; Q57; Q58; H23; H4.
Ano: 2006
URL: http://purl.umn.edu/25397

More empirical evidence on the adoption of chick peas in Western Australia. or: Different ways of thinking about nothing.
Provedor de dados: 31
Autores: Abadi Ghadim,   Amir K.; Burton,   Michael P.; Pannell,   David J.
Tipo: Presentation
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/121986

Agricultural land management strategies to reduce phosphorus loads in the Gippsland Lakes, Australia
Provedor de dados: 31
Autores: Roberts,   Anna M.; Pannell,   David J.; Doole,   Graeme J.; Vigiak,   Olga.
A target to reduce phosphorus flows into the Gippsland Lakes in south-eastern Australia by 40 per cent to improve water quality has previously been established by stakeholders. An integrated analysis at the catchment scale is undertaken to assess the agricultural land management changes required to achieve this target, and to evaluate the cost-effectiveness of these changes. It appears technically feasible to achieve a 40 per cent reduction in P load entering the lakes, but the least-costly way of doing so would require around A$1 billion over 20 years, a dramatic increase in the current levels of funding provided for management. On the other hand, a 20 per cent P reduction could be achieved at much lower cost: around $80 million over 20 years and...
Tipo: Working or Discussion Paper
Palavras-chave: Benefit: cost analysis; Dairy; Diffuse source; Trade-offs; Environmental Economics and Policy; Resource /Energy Economics and Policy; Q15; Q25; Q53; Q57.
Ano: 2010
URL: http://purl.umn.edu/102454

Special issue on water economics and policy
Provedor de dados: 31
Autores: Pannell,   David J.; Peterson,   Deborah C.; Lindner,   Robert K.
Tipo: Journal Article
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/116977

Australian environmental and natural resource policy – from the Natural Heritage Trust to Caring for our Country
Provedor de dados: 31
Autores: Pannell,   David J.
The Natural Heritage Trust and the National Action Plan for Salinity and Water Quality were major national policies focused on land and water degradation and nature conservation in Australia. These programs fell a long way short of achieving their stated goals. It is proposed that to be able to spend their considerable public funds in cost effective ways, they would have needed a number of particular characteristics. Among other things, they needed to prioritise investments well, consistent with an appropriate role of government, and based on analyses that integrated good quality bio-physical and socio-economic information. They needed to select policy mechanisms that would be appropriate for the circumstances. The incentives created by program rules and...
Tipo: Conference Paper or Presentation
Palavras-chave: Policy evaluation; Policy mechanism choice; Policy implementation.
Ano: 2009
URL: http://purl.umn.edu/47935

RIMPhil: a bioeconomic model for integrated weed management of annual barnyardgrass (Echinochloa crus-galli) in Philippine rice farming systems
Provedor de dados: 31
Autores: Beltran,   Jesusa C.; Pannell,   David J.; Doole,   Graeme J.; White,   Benedict.
This paper describes a complex, dynamic simulation model that has been developed for the analysis of integrated weed management programmes for the control of annual barnyardgrass (Echinochloa crus-galli) in rice farming systems in the Philippines. Users of the model may simulate any feasible combination of 49 weed treatments options across wet and dry cropping seasons over 5, 10, 15, and 20 year periods, subject to a predetermined sequence of planting methods. The main outputs of the model include weed seed and plant densities and seasonal and annualised profit over the simulated planning horizon. Model output emphasises the substantial economic benefits associated with effective long-term weed management strategies. In addition, the most-profitable weed...
Tipo: Working or Discussion Paper
Palavras-chave: Barnyardgrass; Bioeconomic model; Integrated weed management; Rice farming systems.; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Farm Management.
Ano: 2011
URL: http://purl.umn.edu/104637

The Place of Expert Systems in Agricultural Economics
Provedor de dados: 31
Autores: Pannell,   David J.
The relevance of expert systems in agricultural economics research and extension is examined. Some of the limitations of existing expert systems are described. Expert systems are useful for storing and retrieving knowledge and for solving diagnostic problems but not for mathematical optimisation. The common method of handling uncertainty in expert systems is shown to have a dubious theoretical basis. Expert systems have no facility for sensitivity analysis. It is concluded that expert systems are unlikely to replace traditional analytical tools for the solution of economic problems but that they may be useful for creation of user-friendly program interfaces.
Tipo: Journal Article
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1988
URL: http://purl.umn.edu/12560

AN OPTIMAL CONTROL MODEL FOR INTEGRATED WEED MANAGEMENT UNDER HERBICIDE RESISTANCE
Provedor de dados: 31
Autores: Gorddard,   Russell J.; Pannell,   David J.; Hertzler,   Greg.
The presence of weeds which have developed resistance to chemical herbicides is a problem of rapidly growing importance in Australian agriculture. We present an optimal control model of herbicide resistance development in ryegrass, the weed for which resistance is most commonly reported. The model is used to select the optimal combination of chemical and non-chemical control measures taking account of the trade off between short term profits and the long term level of herbicide resistance. Results indicate that given the threat of resistance there are benefits from integrating a combination of chemical and non-chemical control measures. The optimal strategy is found to include a declining herbicide dosage as resistance develops, with compensatory increases...
Tipo: Journal Article
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1995
URL: http://purl.umn.edu/22858

Impacts of risk aversion on whole-farm management in Syria
Provedor de dados: 31
Autores: Pannell,   David J.; Nordblom,   Thomas L.
This article reports on a study of the impact of risk on farm management practices in northern Syria, focusing particularly on how these are affected by risk aversion and farm size. The study is based on production data from an eight‐year field trial and on prices from market surveys. A large linear programming model is built, representing the eight years as observations from a discrete probability distribution. Risk aversion is modelled by inclusion of a utility function with constant relative risk aversion, represented using the DEMP/UEP approach.
Tipo: Journal Article
Palavras-chave: Farm Management; Risk and Uncertainty.
Ano: 1998
URL: http://purl.umn.edu/117232

The Value of Green Manuring in the Integrated Management of Herbicide-Resistant Annual Ryegrass (Lolium rigidum)
Provedor de dados: 31
Autores: Monjardino,   Marta; Pannell,   David J.; Powles,   Stephen B.
Herbicide resistance has become a major problem in Australian dryland agriculture. This situation has resulted from the repeated use of herbicides in place of the traditional weed control provided by cultivation and grazing. Farmers have addressed the problem of herbicide resistance by adopting a system of integrated weed management that allows weed control with a range of different techniques and herbicides. One of the non-chemical methods being considered by farmers is “green manuring”, which involves ploughing a healthy growing crop or pasture into the soil in order to prevent weed seed production and provide other benefits. In this study, the trade-offs between the effective weed control and biological benefits provided by green manuring and the large...
Tipo: Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/123707

Policy for climate change adaptation in agriculture
Provedor de dados: 31
Autores: Pannell,   David J.
A number of Australian governments have established or planned programs to assist farmers in adapting to climate change. This paper considers a potential range of policy responses that may be appropriate for climate change adaptation in agriculture. It discusses the extent to which different policy responses may be justified on the basis of market-failure and the likelihood of positive net benefits. While research and extension have the potential to generate significant benefits, there is a need to carefully consider their rationales and emphases. Given the characteristics of climate change (slow, highly uncertain, small relative to climate variability, spatially heterogeneous), the value of information from research and extension to guide farmers’...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/59149

Effectively communicating economics to policy makers
Provedor de dados: 31
Autores: Pannell,   David J.
Many economists are concerned with communicating the results of economic analysis or the implications of economic theory to policy makers. Our effectiveness in doing this varies widely for different individuals and different issues. The present paper is an attempt to provide practical advice to enhance this effectiveness. It considers policy adoption in the light of published literature about the adoption of innovations by small business managers. A small survey of policy makers and policy advisors was conducted, providing a number of practical tips and insights.
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy; Teaching/Communication/Extension/Profession.
Ano: 2004
URL: http://purl.umn.edu/117984

Easy winnings? The economics of carbon sequestration in agricultural soils
Provedor de dados: 31
Autores: Kragt,   Marit Ellen; Pannell,   David J.; Robertson,   Michael J.; Thamo,   Tas.
This paper has been published in a peer-reviewed journal as:  Kragt, M.E., Pannell, D.J., Robertson, M.J. &amp; Thamo, T. (2012) Assessing costs of soil carbon sequestration by crop-livestock farmers in Western Australia, Agricultural Systems, 112: 27-37.  DOI: 10.1016/j.agsy.2012.06.005
Tipo: Working or Discussion Paper
Palavras-chave: APSIM; Bioeconomic Modelling; Carbon Farming; Climate Change Mitigation; MIDAS; Soil Carbon Sequestration; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Farm Management.
Ano: 2011
URL: http://purl.umn.edu/109247

Economics of controlling a spreading environmental weed
Provedor de dados: 31
Autores: Chalak,   Morteza; Pannell,   David J.
Weeds can cause significant problems to natural ecosystems. Although there have been numerous studies on the economics of weed control, relatively few of these studies have focused on natural ecosystems. This paper addresses this gap in the literature by assessing the cost-effectiveness of a comprehensive range of control strategies for blackberry (Rubus anglocandicans) in natural environments in Australia. We developed a stochastic dynamic simulation model and a deterministic dynamic optimisation model. The stochastic model calculates the expected net present value (NPV) of a range of control strategies, including any combination of treatment options. The optimisation model identifies the treatment combination that maximises NPV. Both models represent the...
Tipo: Working or Discussion Paper
Palavras-chave: Environment; Economics; Weed; Stochastic; Optimisation; Management; Environmental Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/108416

Efficiency Policies for Salinity Management: Preliminary Research from a Spatial and Dynamic Metamodel
Provedor de dados: 31
Autores: Graham,   Tennille; White,   Benedict; Pannell,   David J.
Dryland salinity, as an externality, has an impact on various public assets, including roads, biodiversity and public water supplies. This has been seen as an important justification for government to take action and internalise the pollution. Economic policy instruments have been identified as a potential solution to the problem, as they may achieve environmental goals at least cost to society. This paper presents a spatial and dynamic model which aims to compare economic instruments for land use change to abate the off-site impacts of salinity on public assets. Preliminary research is presented, along with a discussion of the model’s structure.
Tipo: Conference Paper or Presentation
Palavras-chave: Dryland salinity; Economic modelling; Meta-modelling; Policy; Agricultural and Food Policy; Land Economics/Use.
Ano: 2003
URL: http://purl.umn.edu/57879

THE VALUE OF INFORMATION IN HERBICIDE DECISION MAKING FOR WEED CONTROL IN AUSTRALIAN WHEAT CROPS
Provedor de dados: 31
Autores: Pannell,   David J.
Most weed control decisions are made with the benefit of some information about weather conditions and actual weed densities. This study is an investigation of the value of adjusting weed control decisions in response to these types of information. For a specific example, it is found that the expected value of information can reach 15% of expected gross margin. The value of information about yield prospects is higher than that for weed density. The value of information is markedly affected by the degree of risk aversion and the type of decision rule adopted. Use of information reduces the expected level of herbicide usage.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 1994
URL: http://purl.umn.edu/30751

Optimal Herbicide Strategies Given Yield and Quality Impacts of Weeds
Provedor de dados: 31
Autores: Pannell,   David J.
Prices received by Australian wheat farmers have increasingly depended on grain quality, especially protein concentration. This concentration depends on various agronomic and physical factors including weed competition. In this paper a model of weed management in the presence of grain quality premiums is presented. Two types of quality premium are examined: a continuout linear payment schedule and a discontinuous "stepped" schedule with substantial premiums for quality levels above a critical level. The model is applied to an analysis of the impact of protein premiums on optimal management strategies for a particular weed in Western Australia. It is found that the impact of protein premiums on optimal weed management is likely to be very small indeed, even...
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 1995
URL: http://purl.umn.edu/12335

Economics of controlling invasive species: a stochastic optimisation model for a spatial-dynamic process
Provedor de dados: 31
Autores: Chalak,   Morteza; Pannell,   David J.; Polyakov,   Maksym.
Invasive species are significant threats to biodiversity, natural ecosystems and agriculture leading to large worldwide economic and environmental damage. Spread and control of invasive species are stochastic processes with important spatial dimensions. Most economic studies of invasive species control ignore spatial and stochastic aspects. This paper covers this gap in the previous studies by analysing a spatially explicit dynamic process of controlling invasive species in a stochastic setting. We show how stochasticity, spatial location of infestation and control can influence the spread, control efficiency and optimal control strategies. The main aim of this paper is to analyse the relationship between economic parameters and stochastic spatial...
Tipo: Conference Paper or Presentation
Palavras-chave: Spatial; Dynamics; Invasive; Economics; Stochastic; Optimisation; Environmental Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/103325

Monitoring of compliance in Australian conservation contracts
Provedor de dados: 31
Autores: Crowe,   Bronwyn; White,   Benedict; Pannell,   David J.; Lindner,   Robert K.
Government and non-government conservation agencies have long-term goals and objectives to provide environmental services, such as conserving the biodiversity of Australian native vegetation. In addition to national parks and reserves, private lands are often included in conservation programs to achieve these objectives. Formal contracts are entered into between the private landholder and the conservation agency to provide environmental services, or more commonly to provide inputs that are likely to lead to environmental services. The paper examines the costs and benefits of monitoring these conservation contracts when biodiversity change is stochastic.
Tipo: Conference Paper or Presentation
Palavras-chave: Conservation; Compliance; Monitoring; Enforcement; Environmental regulation; Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/5990

Optimal control of a stochastic biological invasion
Provedor de dados: 31
Autores: Chalak,   Morteza; Pannell,   David J.
Although there have been numerous studies on the economics of weed control, relatively few of these studies have focused on natural ecosystems. The aims of this papers are: A) to identify the combination of control options that is optimal for blackberry (Rubus anglocandicans) in Australian natural ecosystems, B) to assess whether an integrated control strategy is superior to chemical-only strategies, C) to evaluate the economic net benefits of specific biologically oriented control methods (a rust and grazing by goats), D) to determine how changes in model parameters affect the optimal control strategy. To address these aims, a stochastic dynamic simulation model and a stochastic dynamic programming model are developed. The results indicate that, while an...
Tipo: Presentation
Palavras-chave: Environment; Economics; Weed; Stochastic; Optimisation; Management; Environmental Economics and Policy.
Ano: 2012
URL: http://purl.umn.edu/124373

Role and value of including lucerne (Medicago sativa L.) phases in crop rotations for the management of herbicide-resistant Lolium rigidum in Western Australia
Provedor de dados: 31
Autores: Doole,   Graeme J.; Pannell,   David J.
Use of lucerne (Medicago sativa L.) pastures in crop rotations has been proposed as a method to enhance weed management options for growers facing herbicide resistance in Western Australia. An existing model for analysing herbicide resistance in the important crop weed annual ryegrass (Lolium rigidum Gaud.) is consequently extended to include lucerne, used for grazing by a sheep enterprise. Seven rotational options are analysed, including various combinations of lucerne, annual pastures, and crops. Lucerne provides additional weed management benefits across the rotation, but in the region studied these benefits are only sufficient to make lucerne rotations the most profitable option in situations where ryegrass is resistant to multiple herbicide groups,...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 2007
URL: http://purl.umn.edu/9233

Practical and Theoretical Underpinnings of INFFER (Investment Framework For Environmental Resources)
Provedor de dados: 31
Autores: Pannell,   David J.; Roberts,   Anna M.; Park,   Geoff; Curatolo,   April; Marsh,   Sally P.
INFFER (Investment Framework for Environmental Resources) was developed to help investors of public funds to improve the delivery of outcomes from environmental programs. It assists environmental managers to design projects, to select delivery mechanisms, and to rank competing projects on the basis of benefits and costs. The design of INFFER and the activities of the INFFER projects are based on extensive experience of working with environmental managers and policy makers. This experience has highlighted a number of important practical lessons, that have strongly influenced the design and implementation of INFFER. These lessons include the need for simplicity, training and support of users, trusting relationships with users, transparency, flexibility,...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/59148

Nonpoint pollution policy evaluation under ambiguity
Provedor de dados: 31
Autores: Doole,   Graeme J.; Pannell,   David J.
Environmental policy evaluation is characterised by a paucity of information. Bounded sets may be more appropriate for representing this ambiguity than traditional probability distributions. A formal calibration method for regional policy models, positive mathematical programming, is thus extended to incorporate parameter definition using bounded sets through the novel method of robust non-linear programming. The resulting procedure identifies strong bounds on the range of abatement costs accruing to environmental policy and improves the relevance and value of modelling studies through not limiting conclusions to realisations of specific point estimates or probability distributions. Moreover, it may easily be solved using standard mathematical-programming...
Tipo: Conference Paper or Presentation
Palavras-chave: Interval analysis; Nonpoint pollution; Robust optimisation.
Ano: 2009
URL: http://purl.umn.edu/48036

Easy winnings? The economics of carbon sequestration in agricultural soils
Provedor de dados: 31
Autores: Kragt,   Marit Ellen; Pannell,   David J.; Robertson,   Michael J.
Paper removed temporarily by authors 11/28/11.
Tipo: Conference Paper or Presentation
Palavras-chave: Agriculture; Bio-economic modelling; Greenhouse gases; Soil carbon; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/100575

The potential contribution of forage shrubs to economic returns and environmental management in Australian dryland agricultural systems
Provedor de dados: 31
Autores: Monjardino,   Marta; Revell,   Dean; Pannell,   David J.
In face of climate change and other environmental challenges, inclusion of perennial forage shrubs in Australian agricultural systems has the potential to deliver multiple benefits: increased whole-farm profitability and improved natural resource management. The profitability of shrubs was investigated using MIDAS (Model of an Integrated Dryland Agricultural System), a bio-economic model of a mixed crop/livestock farming system. We found that including forage shrubs could increase farm profitability by over 20% for an optimal 10% of farm area in shrubs. The impact of shrubs on whole-farm profit accrues primarily through the provision of a predictable supply of “out-of-season” feed, thereby reducing supplementary feed costs, and through the deferment of...
Tipo: Conference Paper or Presentation
Palavras-chave: Whole-farm modelling; Economics; Perennial species; Agricultural and Food Policy; Agricultural Finance; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Land Economics/Use; Livestock Production/Industries.
Ano: 2009
URL: http://purl.umn.edu/51537

Economic impacts of high labour cost and herbicide resistance for the management of annual barnyardgrass (Echinochloa crus-galli) in rice production in the Philippines
Provedor de dados: 31
Autores: Beltran,   Jesusa C.; Pannell,   David J.; Doole,   Graeme J.
Implications of increasing labour cost and development of herbicide resistance for profitable weed management in Philippine rice farming systems are investigated. The study employs RIMPhil (Resistance and Integrated Management in the Philippines), a bioeconomic simulation model developed to provide a comprehensive assessment of integrated weed management programmes for the control of annual barnyardgrass (Echinochloa crus-galli) in rice crops. Results indicate that herbicide application will become increasingly economically attractive, relative to manual weeding, as labour cost increases. This is important since urban migration in the Philippines continues to increase the scarcity of rural labour. Results also show that the onset of herbicide resistance...
Tipo: Working or Discussion Paper
Palavras-chave: Barnyardgrass; Bioeconomic model; Herbicide resistance; Integrated weed management; Rice production; Crop Production/Industries; Farm Management; Research and Development/Tech Change/Emerging Technologies.
Ano: 2011
URL: http://purl.umn.edu/108770

An Integrated Package for Linear Programming
Provedor de dados: 31
Autores: Pannell,   David J.
Batterham (1987) described a computer program which eases entry of mathematical programming data. Users of the program first use a text editor to enter data in a relatively efficient format, which the program then converts into MPS format as required by most mathematical programming solution programs. Alternatively the program can read and convert data from a microcomputer spreadsheet data file.  This note is a description of a microcomputer program which has advantages over each of these procedures. The program, GULP (General, User friendly Linear Programming), is an integrated package of procedures for data entry, matrix printing and model solution. GULP has particular advantages for education and has been used in a number of courses in Western Australia.
Tipo: Journal Article
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 1988
URL: http://purl.umn.edu/12569

Whole Farm Modeling of the Effect of Risk on Optimal Tillage and Nitrogen Fertilizer Intensity
Provedor de dados: 31
Autores: Gandorfer,   Markus; Pannell,   David J.; Meyer-Aurich,   Andreas.
Tipo: Conference Paper or Presentation
Palavras-chave: Nitrogen; Tillage; Risk; Risk aversion; Crop Production/Industries; Farm Management; Production Economics; Risk and Uncertainty.
Ano: 2010
URL: http://purl.umn.edu/61185

Factors that affect the use of herbicides in Philippine rice farming systems
Provedor de dados: 31
Autores: Beltran,   Jesusa C.; Pannell,   David J.; Doole,   Graeme J.; White, Benedict.
This study involves the application of a random-effects double-hurdle model to survey data to identify the farm-level factors affecting the adoption and intensity of herbicide use in rice production in the Philippines. Results broadly indicate apparent differences in the degree to which important explanatory variables affect the intensity and adoption decisions. The age of the farmer, household size, and irrigation are the significant predictors influencing the decision of farmers to use herbicides, while economic variables such as the price of herbicides, total income of farmers, and the use of bank loans or credit are the highly significant factors determining the intensity of herbicide use. Significant determinants of both the adoption and intensity...
Tipo: Working or Discussion Paper
Palavras-chave: Herbicide use; Double-hurdle model; Adoption; Rice farming system.; Demand and Price Analysis.
Ano: 2011
URL: http://purl.umn.edu/108769

Economics of controlling a spreading environmental weed
Provedor de dados: 31
Autores: Chalak-Haghighi,   Morteza; Pannell,   David J.
Weeds can cause significant problems to natural ecosystems. Although there have been numerous studies on the economics of weed control, relatively few of these studies have focused on natural ecosystems. This paper addresses this gap in the literature by assessing the cost-effectiveness of a comprehensive range of control strategies for blackberry (Rubus anglocandicans) in natural environments in Australia. We developed a stochastic dynamic simulation model and a deterministic dynamic optimisation model. The stochastic model calculates the expected net present value (NPV) of a range of control strategies, including any combination of treatment options. The optimisation model identifies the treatment combination that maximises NPV. Both models represent the...
Tipo: Conference Paper or Presentation
Palavras-chave: Environment; Economics; Weed; Stochastic; Optimisation; Management; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/58886

Managing Herbicide Resistance: Should you Conserve or Exploit your Herbicides?
Provedor de dados: 31
Autores: Giesbertz,   M.; Pannell,   David J.; Abadi,   Amir; Powles,   Stephen B.
Herbicide resistance has become a major problem in dryland agriculture. In Australia this particularly applies to annual ryegrass (Lolium rigidum) which has developed multiple resistance to a wide range of commonly used selective herbicides. Although herbicides are a very cost-effective means of reducing weed density, major changes to their use are required if sustainable weed management is to be achieved. In this study a model of ryegrass population dynamics was used to identify the best integrated weed management strategies and to evaluate changes in the economic payoff when choosing to conserve herbicides rather than exploit them rapidly. A situation of evolving herbicide resistance was simulated for a continuous wheat-lupin rotation and two cropping...
Tipo: Presentation
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/123808

Cursed by Too Much Water in a Dry Place: Implications of Dryland Salinity for Farm Management, Policy and Research in Australia
Provedor de dados: 31
Autores: Pannell,   David J.; Ewing,   Michael A.; Ridley,   Anna M.
Dryland salinity is one of the most prominent and intractable problems facing farm managers in the extensive non-irrigated farming systems of southern Australia. The issue was ignored by policy makers until late in the twentieth century, but is now the sole or partial subject of government programs with budgets totaling several billion Australian dollars. Salt occurs naturally at high levels in the subsoils of most Australian agricultural land. As a result of clearing native vegetation, groundwater tables have risen, mobilising the salt and causing adverse impacts to farmland, infrastructure, water resources, and biodiversity. The main action required to prevent groundwater tables from rising is establishment of perennial plants, either herbaceous...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management; Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/24310

Mapping the regional benefits and costs of strategies for  controlling dryland salinity
Provedor de dados: 31
Autores: van Bueren,   Martin; Pannell,   David J.; Hodgson,   G.
Hydrologists predict that salinity in the agricultural region of Western Australia will eventually affect an average of 30 percent of the landscape if nothing is done to reduce current levels of recharge. The scale of tree planting and other works thought to be required for controlling salinity represent a radical departure from the traditional agricultural system practised in WA. The objective of the research presented in this paper was to assess whether a large investment in salinity control is warranted at a regional level and, if so, who are the winners and losers. A geographic information system (GIS), together with maps of predicted salinity, were used to facilitate the economic analysis. The GIS served as a systematic way of identifying and...
Tipo: Presentation
Palavras-chave: Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2000
URL: http://purl.umn.edu/123734

Prioritising investment to enhance biodiversity in an agricultural landscape
Provedor de dados: 31
Autores: Polyakov,   Maksym; Pannell,   David J.; Rowles,   Alexei; Park,   Geoff; Roberts,   Anna M.
The removal, alteration and fragmentation of habitat are key threats to the biodiversity of terrestrial ecosystems. Investment to protect biodiversity assets (e.g. restoration of native vegetation) in dominantly agricultural landscapes usually results in a loss of agricultural production. This can be a significant cost that is often overlooked or poorly addressed in analyses to prioritise such investments. Accounting for this trade-off is important for more successful, realistically feasible and cost-effective biodiversity conservation. We developed a spatially explicit bio-economic optimisation model that simulates the effect of conservation effort on the diversity of woodland-dependent birds in the Avoca catchment (330 thousand ha) in North-Central...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/59152

Book reviews
Provedor de dados: 31
Autores: Crase,   Lin; Simmons,   Phil; Parton,   Kevin A.; Pannell,   David J.
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2004
URL: http://purl.umn.edu/117967

ADOPT: a tool for predicting adoption of agricultural innovations
Provedor de dados: 31
Autores: Kuehne,   Geoff; Llewellyn,   Rick S.; Pannell,   David J.; Wilkinson,   Roger; Dolling,   P.; Ewing,   Michael A.
A wealth of evidence exists about the adoption of new practices and technologies in agriculture but there does not appear to have been any attempt to simplify this vast body of research knowledge into a model to make quantitative predictions across a broad range of contexts. This is despite increasing demand from research, development and extension agencies for estimates of likely extent of adoption and the likely timeframes for project impacts. This paper reports on the reasoning underpinning the development of ADOPT (Adoption and Diffusion Outcome Prediction Tool). The tool has been designed to: 1) predict an innovation‘s likely peak extent of adoption and likely time for reaching that peak; 2) encourage users to consider the influence of a structured...
Tipo: Conference Paper or Presentation
Palavras-chave: Adoption; Diffusion; Prediction; Research and Development/Tech Change/Emerging Technologies.
Ano: 2011
URL: http://purl.umn.edu/100570

Determining the cost-effectiveness of Phytophthora cinnamomi management in the Fitzgerald River National Park
Provedor de dados: 31
Autores: Davis,   Katrina J.; Pannell,   David J.; Kragt,   Marit Ellen.
The Fitzgerald River National Park is one of the world’s 25 biological hotspots, containing many endemic flora and fauna species. Its unique biodiversity is being threatened by the introduced root pathogen, Phytophthora cinnamomi. We evaluate the cost-effectiveness of strategies to manage Phytophthora cinnamomi in the park, using the Investment Framework for Environmental Resources (INFFER). Management strategies based on current and higher investment levels are shown to have high Benefit Cost Indices. These results support the use of public conservation funds to address the threat of Phytophthora cinnamomi, and show the need for improved understanding of the impact and the adoption of strategies.
Tipo: Presentation
Palavras-chave: Cost-effectiveness; Economic investment framework; Phytophthora cinnamomi; Resource /Energy Economics and Policy.
Ano: 2012
URL: http://purl.umn.edu/124288

Environment protection: challenges for future farming
Provedor de dados: 31
Autores: Pannell,   David J.
There has been increased public demand for environment protection, including in rural areas. Government programs and policies have responded to these demands in various ways, such as by attempting to increase farmer awareness of environmental issues, increasing budgets for rural environmental programs, increasing environmental regulation, purchasing water from irrigators for environmental purposes, and encouraging farmer adoption of new environmentally friendly practices. These changes create a number of challenges for farmers, including challenges related to maintaining farm productivity, meeting community expectations, living with less water and evaluating new opportunities. These challenges are described and discussed. While there certainly are...
Tipo: Article
Palavras-chave: Environment; Community expectations; Water policy; Carbon farming; Farm Management.
Ano: 2012
URL: http://purl.umn.edu/122898

Monitoring of Compliance in Western Australian Conservation Contracts
Provedor de dados: 31
Autores: Crowe,   Bronwyn; White,   Benedict; Pannell,   David J.
Contracting with private landholders for labor towards production of environmental services (payment for actions) or the environmental services themselves (payment for outcomes) is reliant on the environmental organization’s ability to monitor and assess the environmental outcomes provided. Inaccurate and costly assessment reduces the cost effectiveness of the contract. Different assessment technologies will have different impacts on the cost effectiveness and optimal contracting choice of the environmental organization. The paper compares the influence of field assessment by a local expert, and remote assessment via satellite imagery, on the optimal contracting decision for the Western Australian wheat belt.
Tipo: Conference Paper or Presentation
Palavras-chave: Conservation; Environmental; Compliance; Monitoring; Enforcement; Environmental regulation; Crop Production/Industries; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/91155

Rethinking the externality issue for dryland salinity in Western Australia
Provedor de dados: 31
Autores: Pannell,   David J.; McFarlane,   Donald J.; Ferdowsian,   Ruhi.
Dryland salinity has been conceived of as a problem involving massive off‐site impacts and therefore requiring coordinated action to ensure that land managers reduce those off‐site impacts. In economic terms, salinity is seen as a problem of market failure due to externalities, including external costs from one farmer to another and from the farm sector to the non‐farm sector. In this article, we argue that, at least in Western Australia (WA), externalities are much less important as a cause of market failure than has been widely believed. If all externalities from salinity in WA were to be internalised, the impact on farm management would be small.
Tipo: Journal Article
Palavras-chave: Land Economics/Use.
Ano: 2001
URL: http://purl.umn.edu/117571

Explaining farmers’ monitoring of sustainability indicators: a bore-ing example for salinity in Western Australia
Provedor de dados: 31
Autores: Marsh,   Sally P.; Burton,   Michael P.; Pannell,   David J.
Dryland salinity is one of the most pressing land management problems in Western Australia. A number of projects are in progress to provide a more comprehensive picture of the location and extent of potentially saline areas in the landscape. Associated with some of these projects, a large number of bores (piezometers) have been installed or are being installed throughout the agricultural area to provide information on depth to groundwater and changes in water levels over time. These bores provide information about whether and when the ground water will reach the surface, causing losses of agricultural production through salinisation of soils. Using data from the Jerramungup Land Conservation District (LCD) we explore factors influencing the behaviour of...
Tipo: Presentation
Palavras-chave: Sustainability indicators; Environmental indicators; Resource monitoring; Economics of information; Hydrology; Dryland salinity; Western Australia; Farm Management; Land Economics/Use.
Ano: 2000
URL: http://purl.umn.edu/123702

Rethinking the Externality Issue for Dryland Salinity in Western Australia
Provedor de dados: 31
Autores: Pannell,   David J.; McFarlane,   Donald J.; Ferdowsian,   Ruhi.
Dryland salinity has been conceived of as a problem involving massive off-site impacts and therefore requiring coordinated action to ensure that land managers reduce those off-site impacts. In economic terms, salinity is seen as a problem of market failure due to externalities, including external costs from one farmer to another and from the farm sector to the non-farm sector. In this paper, we argue that, at least in Western Australia (WA), externalities are much less important as a cause of market failure than has been widely believed. If all externalities from salinity in WA were to be internalised, the impact of this on farm management would be small. There are a number of factors contributing to this conclusion, both hydrological and socioeconomic....
Tipo: Presentation
Palavras-chave: Farm Management; Marketing.
Ano: 2000
URL: http://purl.umn.edu/123715

Optimising the spatial pattern of landscape revegetation
Provedor de dados: 31
Autores: Polyakov,   Maksym; Pannell,   David J.; Rowles,   Alexei; Park,   Geoff; Roberts,   Anna M.
The spatial pattern of landscape reconstruction makes a substantial difference to environmental outcomes. We develop a spatially explicit bio-economic model that optimises the reconstruction of a heavily cleared landscape through revegetation. The model determines the spatial priorities for revegetation that minimises economic costs subject to achieving particular improvements in habitat for 29 woodland-dependent bird species. The study focuses on the Avoca catchment (330 thousand ha) in North-Central Victoria. Our model incorporates spatial pattern and heterogeneity of existing and reconstructed vegetation types. The revegetation priorities are identified as being: sites in the vicinity of existing remnants, riparian areas, and parts of the landscape with...
Tipo: Conference Paper or Presentation
Palavras-chave: Landscape reconstruction; Biodiversity; Optimisation; Habitat; Environmental Economics and Policy; Land Economics/Use; Q57.
Ano: 2011
URL: http://purl.umn.edu/100697

Changing the direction of environmental investment in Australia: Learnings from implementing INFFER
Provedor de dados: 31
Autores: Marsh,   Sally P.; Curatolo,   April; Pannell,   David J.; Park,   Geoff; Roberts,   Anna M.; Alexander,   Jennifer.
Investment in natural resource management (NRM) by regional organisations in Australia has been widely criticised for failing to achieve substantial environmental outcomes. The Investment Framework for Environmental Resources (INFFER) is a tool for developing and prioritising projects to address environmental issues such as water quality, biodiversity decline, environmental pest impacts and land degradation. INFFER is an asset-based, targeted, and outcome-focussed approach to environmental investment, and as such is a very different and more rigorous approach to prioritising possible environmental projects than used previously by most catchment management organisations (CMOs) in Australia. From 2008 to 2010 INFFER has been trialled with CMOs. Evaluation...
Tipo: Conference Paper or Presentation
Palavras-chave: NRM investment planning; NRM investment prioritisation; Regional catchment management organisations; NRM policy; Environmental planning; Environmental prioritisation; Environmental policy; Environmental Economics and Policy; Research and Development/Tech Change/Emerging Technologies; Q50; Q58.
Ano: 2011
URL: http://purl.umn.edu/100584

The impact of inaccurate and costly assessment in payments for environmental services
Provedor de dados: 31
Autores: Crowe,   Bronwyn; White,   Benedict; Pannell,   David J.
Paying private landholders for environmental services, rather than input-based payments, has been proposed as a way to improve the performance of contracts for conservation agencies. A challenge is that the assessment of environmental services is subjective, raising the question of how assessment accuracy impacts on landholder behaviour and contract design. A model is developed of a contract between a conservation agency and a private landholder for the provision of environmental services. The model is used to estimate the impact of inaccurate and costly assessment on the optimal landholder labour effort and the optimal incentive payment. The model shows that inaccurate and costly assessment reduces the cost-effectiveness of the contract. Application of...
Tipo: Conference Paper or Presentation
Palavras-chave: Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/58876

Climate Change and the Economics of Farm Management in the Face of Land Degradation: Dryland Salinity in Western Australia
Provedor de dados: 31
Autores: John,   Michele; Pannell,   David J.; Kingwell,   Ross S.
Paper removed at request of authors 08/03/07.
Tipo: Conference Paper or Presentation
Palavras-chave: Dryland salinity; Climate change; Low rainfall agriculture; Land degradation; Whole farm bioeconomic modelling; Environmental Economics and Policy; Farm Management.
Ano: 2006
URL: http://purl.umn.edu/25800