|
|
|
| Registros recuperados: 23 | |
|
|
| Hitchens, M.T.; Thampapillai, Dodo J.; Sinden, Jack A.. |
| The present trend to more quantitative analysis for public decisions on land allocation has included studies based on the opportunity cost criterion. This encouraging trend could be promoted through improved use of the criterion. Two important improvements are the analysis of uncertainty and the generation and analysis of a whole schedule of land use plans. The paper illustrates these improvements through empirical application of linear programming to two land use problems in New South Wales. |
| Tipo: Journal Article |
Palavras-chave: Land Economics/Use. |
| Ano: 1978 |
URL: http://purl.umn.edu/10301 |
| |
|
| |
|
|
| Townsend, J.; Sinden, Jack A.. |
| The economic impact of weeds on farms in the New England Region of New South Wales is estimated from data from a cross -sectional survey. Weeds can be classed as noxious or declared plants, plants that the farmers perceived as weeds, and trees -- which many farmers also perceived as weeds. Variables were defined for several levels of intensity of infestation for each of these three classes of weeds. The impact of each these variables, on property income and stocking, was estimated through Cobb-Douglas production functions. The presence of very-heavy infestations of non-noxious weeds, and heavy infestations of non-noxious weeds, were found to be associated with reductions in income. In total, the income of the representative property would be increased... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Weeds; Trees; Income; Stocking; Farm Management. |
| Ano: 1999 |
URL: http://purl.umn.edu/12918 |
| |
|
| |
|
|
| Cacho, Oscar J.; Wise, Russell M.; Hester, Susan M.; Sinden, Jack A.. |
| When a weed invasion is discovered a decision has to be made as to whether to attempt to eradicate it, contain it or do nothing. Ideally, these decisions should be based on a complete benefit-cost analysis, but this is often not possible. A partial analysis, combining knowledge of the rate of spread, seedbank longevity and economic-analysis techniques, can assist in making the best decision. This paper presents a model to decide when immediate eradication of a weed should be attempted, or whether weed control should be attempted at all. The technique is based on identifying two 'switching points': the invasion size at which it is no longer optimal to attempt eradication, and the invasion size at which it becomes optimal not to apply any form of control. It... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Invasive species; Eradication; Containment; Economics; Weed control; Switching point; Farm Management. |
| Ano: 2004 |
URL: http://purl.umn.edu/12908 |
| |
|
|
| Sinden, Jack A.. |
| Changing social objectives and a greater variety of policy instruments require extra detail and fuller specification in analyses of land policies. Consumer's surplus remains an appropriate measure of net social benefit but surplus values must be estimated more carefully. The paper examines the application of four surplus concepts to policy problems and illustrates a methodology to estimate all four. The estimates for the different concepts can differ widely and the correct concepts have not always been advocated. The methodology appears useful where other estimation procedures have failed. |
| Tipo: Journal Article |
Palavras-chave: Land Economics/Use. |
| Ano: 1978 |
URL: http://purl.umn.edu/22718 |
| |
|
| |
|
|
| Odom, Doreen I.S.; Griffith, Garry R.; Sinden, Jack A.. |
| The area of the imported weed Scotch Broom (Cytisus scoparius) is steadily expanding and eliminating natural ecosystems and their habitats of rare and endangered species in Barrington Tops National Park. A research project, funded by the CRC for Weeds Management Systems, has commenced to provide economic information to assist the management of this problem. To provide a focus for the project, the economic issues surrounding the broom problem are explored in this paper. The general economic characteristics of weeds in natural ecosystems are discussed first, and include externalities and public goods. The economic issues in weed management are addressed next, and include the problems of government management, choice of control measure, and sources of... |
| Tipo: Presentation |
Palavras-chave: Crop Production/Industries. |
| Ano: 2000 |
URL: http://purl.umn.edu/123712 |
| |
|
|
| Scott, Robert R.; Sinden, Jack A.. |
| Australian policies to preserve native vegetation on farms rest on mandatory regulations without compensation, whereas policies in most OECD countries rest on voluntary conservation with compensation. In New South Wales, the Native Vegetation Conservation Act 1998 restricts farmers from clearing native vegetation on their own freehold land, and offers no compensation. The Act may therefore impose opportunity costs, or losses in income, on landholders. These opportunity costs are estimated for a case study property in the Hunter Valley of New South Wales, and these results are then generalised to assess the broad trade-offs between development and preservation. The losses in income appear to vary between 5 and 10 per cent of annual income, depending on... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Native vegetation; Environmental preservation; Opportunity cost.; Land Economics/Use. |
| Ano: 1999 |
URL: http://purl.umn.edu/12938 |
| |
|
|
| Vere, David T.; Sinden, Jack A.; Campbell, M.H.. |
| Weeds are responsible for extensive annual losses of agricultural production although convincing estimates of such loss are largely unavailable, particularly in Australia. Recognition of the economic cost of weeds is important for a number of reasons which include the rationalization of weed control programmes and the direction of weeds research. Because of data deficiencies relating to extent and distribution, impact on production and the environment, and the spread potential of individual weed species, this area of weeds research has to date received little attention. In this paper, the concepts of economic surplus are utilized in a general social benefit framework to assess the economic importance of serrated tussock (Nassella trichotoma), the major... |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1980 |
URL: http://purl.umn.edu/9609 |
| |
|
| |
|
| |
|
|
| Sinden, Jack A.. |
| The poplar species, Populus deltoides provides types which are ecologically well suited to the rich alluvial soils of the north coast. This study uses a simple simulation model and linear programming to explore the economics of introducing poplars into farm plans on this soil type. If the price of poplar timber does not fall by more than 60 per cent relative to other agricultural prices, and if plantations can be financed at discount rates less than 10 per cent, then poplar growing has considerable scope for integration with other farm activities. Poplars should be included under all the farm conditions tested, namely farm sizes between 100 and 150 acres, labour forces between one and three men per farm and a doubling of dairy profitability over the... |
| Tipo: Journal Article |
Palavras-chave: Farm Management. |
| Ano: 1970 |
URL: http://purl.umn.edu/9564 |
| |
|
|
| Odem, Doreen; Sinden, Jack A.; Cacho, Oscar J.; Griffith, Garry R.. |
| Scotch broom (Cytisus scoparius, L.), is an exotic leguminous shrub, native to Europe, which invades pastoral and woodland ecosystems and adjoining river systems in cool, high rainfall regions of southeastern Australia. Broom has invaded 10,000 hectares of eucalypt woodland at Barrington Tops National Park in New South Wales, and is having a major impact on the natural ecology of the sub-alpine environment. It is extremely competitive with the native flora, retarding their growth and in many areas blanketing the ground and preventing growth of many understorey species in open forest areas. An active program to manage this invasion is being implemented by the National Parks and Wildlife Service. The management issues include whether eradication or... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Scotch broom; Economic issues; Management issues; Natural environments; Bioeconomic model; Environmental Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/58193 |
| |
|
|
| Jones, Randall E.; Cacho, Oscar J.; Sinden, Jack A.. |
| An appropriate economic framework for valuing the benefits of weed management technologies is to treat weeds as a renewable resource stock problem. Consequently, the weed seed bank is defined as a renewable resource that changes through time due to management and seasonal conditions. The goal of decision-makers is to manage this (negative) resource so as to maximise returns over some pre-specified period of time. A modelling framework is presented for evaluating the biological and economic effects of weed management. The framework includes population dynamics, water balance, crop growth, pasture growth and crop/pasture rotation models for measuring the physical interactions between weeds and the environment. These models link in with numerical optimal... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Weeds; Modelling; Dynamic analysis.; Land Economics/Use. |
| Ano: 2003 |
URL: http://purl.umn.edu/57902 |
| |
|
|
| Sinden, Jack A.. |
| Questionnaire surveys are an established economic research method for eliciting consumers' surplus values. However, the necessarily hypothetical nature of surveys may not promote truthful responses. In 17 empirical tests, actual money donations were elicited and compared to hypothetical donations elicited previously. In all 17, there was no statistical difference between the actual and hypothetical willingness to pay. Hypothetical bias was therefore absent in all these tests. |
| Tipo: Journal Article |
Palavras-chave: Consumer/Household Economics; Research Methods/ Statistical Methods. |
| Ano: 1988 |
URL: http://purl.umn.edu/22956 |
| |
|
|
| Sinden, Jack A.. |
| The Native Vegetation Conservation Act was introduced on January 1st 1998 to limit the clearing of native grassland and woodland in NSW. The Act has limited clearing and development to crops, has protected biodiversity, and may have enhanced soil and water conservation. But this analysis of the prices paid for land in Moree Plains Shire shows that the Act has reduced land values by some 21 per cent and has already reduced annual incomes by 10 per cent across the whole Shire. This reduction in annual incomes may well reach 18 per cent by 2005. This decrease in income means that farm households in the Shire currently must give up 15.6 per cent of their household income because they must protect native vegetation on their farms. In contrast, urban households... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Native vegetation; Opportunity costs; Land values; Environmental Economics and Policy; Farm Management; Land Economics/Use. |
| Ano: 2003 |
URL: http://purl.umn.edu/12951 |
| |
|
|
| Sinden, Jack A.. |
| The Native Vegetation Conservation Act was introduced on January 1st 1998 to protect native grassland and woodland in New South Wales. The Act has limited clearing of native vegetation and development to crops and pasture, has protected biodiversity, and may have enhanced soil and water conservation. But an analysis of variations in the prices paid for farm land in Moree Plains Shire, with the complementary hedonic and bargaining methods, shows how buyers, sellers, and the market as a whole, value the characteristics of the land. It shows that the Act has led to substantial losses in land values for the farmers. The Act has imposed higher costs on those who had kept most vegetation, and on those who most need to retain their options to clear and develop.... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Environmental Economics and Policy; Land Economics/Use. |
| Ano: 2003 |
URL: http://purl.umn.edu/12903 |
| |
| Registros recuperados: 23 | |
|
|
|
