Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 100
Primeira ... 12345 ... Última
Imagem não selecionada

Imprime registro no formato completo
Economic Impacts of Yellow Starthistle on California Ranchers AgEcon
Eagle, Alison J.; Eiswerth, Mark E.; Johnson, Wayne S.; Schoenig, Steve E.; van Kooten, G. Cornelis.
While the significant ecosystem damage caused by invasive weeds has been well documented, the economic impacts of specific invasive weed species are poorly understood. Yellow starthistle (Centaurea solstitialis L., hereafter YST) is the most widespread non-crop weed in California, resulting in serious damage to forage on natural range and improved pasture. A survey was administered to California cattle ranchers to investigate YST infestation rates, loss of forage quantity and value, and control or eradication efforts. The results were used to estimate county-wide economic losses for three focus counties, as well as state-wide economic losses, due to YST in California. Total losses of livestock forage value due to YST on private land for the state of...
Tipo: Working or Discussion Paper Palavras-chave: Nonnative species; Invasive weeds; Yellow starthistle; Ranching profitability; Forage; Livestock; Crop Production/Industries; Environmental Economics and Policy; Livestock Production/Industries; Q24; Q57.
Ano: 2006 URL: http://purl.umn.edu/37028
Imagem não selecionada

Imprime registro no formato completo
The Effect of Uncertainty on Contingent Valuation Estimates: A Comparison AgEcon
Shaikh, Sabina L.; Sun, Lili; van Kooten, G. Cornelis.
We examine the impact of uncertainty on contingent valuation responses using (1) a survey of Canadian landowners about willingness to accept compensation for converting cropland to forestry and (2) a survey of Swedish residents about willingness to pay for forest conservation. Five approaches from the literature for incorporating respondent uncertainty are used and compared to the traditional RUM model with assumed certainty. The results indicate that incorporating uncertainty has the potential to increase fit, but could introduce additional variance. While some methods for uncertainty are an improvement over traditional approaches, we caution against systematic judgments about the effect of uncertainty on contingent valuation responses.
Tipo: Working or Discussion Paper Palavras-chave: Respondent uncertainty; Willingness to accept; Contingent valuation; Environmental Economics and Policy; Land Economics/Use; Q10; Q15; Q23.
Ano: 2005 URL: http://purl.umn.edu/37025
Imagem não selecionada

Imprime registro no formato completo
Economic Analysis of Feed-in Tariffs for Generating Electricity from Renewable Energy Sources AgEcon
van Kooten, G. Cornelis.
Tipo: Working or Discussion Paper Palavras-chave: Feed-in tariffs; Renewable energy; Resource /Energy Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/107093
Imagem não selecionada

Imprime registro no formato completo
ESTIMATION OF SOIL EROSION TIME PATHS: THE VALUE OF SOIL MOISTURE AND TOPSOIL DEPTH INFORMATION AgEcon
Weisensel, Ward P.; van Kooten, G. Cornelis.
Rates of soil erosion in the dryland cropping region of Saskatchewan are investigated under alternative cropping strategies. Chemical fallow is examined as an alternative to tillage fallow for moisture and soil conservation. Conclusions include: (a) flexible cropping increases net discounted returns and substantially reduced soil erosion compared to the predominant crop rotation; (b) chemical fallow is a viable alternative to tillage fallow but only when topsoil already has been eroded substantially; and (c) an increase in the discount rate is soil conserving, since it causes producers to plant more often rather than fallow.
Tipo: Journal Article Palavras-chave: Land Economics/Use.
Ano: 1990 URL: http://purl.umn.edu/32497
Imagem não selecionada

Imprime registro no formato completo
Canada-US Softwood Lumber Trade Revisited: Examining the Role of Substitution Bias in the Context of a Spatial Price Equilibrium Framework AgEcon
Mogus, Anthony; Stennes, Brad; van Kooten, G. Cornelis.
In the last two decades, softwood lumber trade between Canada and the United States has been characterized by numerous trade restrictions. Many studies have attempted to quantify the effects of such sanctions, and in doing so, softwood lumber was modeled as a single, homogenous commodity. However, recent research has suggested that this may be a misleading assumption, since not all softwood lumber products are equivalent substitutes. We refer to this problem as the substitution bias, and uniquely address this issue in estimating the effects of trade restricting policies. Using a spatial price equilibrium (spe) model, impacts of the post-sla import duties are estimated and compared to estimates of two alternative policy regimes – an export tax and quota. By...
Tipo: Working or Discussion Paper Palavras-chave: Softwood lumber trade; Spatial price equilibrium; Lumber substitutability; Environmental Economics and Policy; International Relations/Trade; Resource /Energy Economics and Policy; Q23; Q27; Q58.
Ano: 2005 URL: http://purl.umn.edu/37016
Imagem não selecionada

Imprime registro no formato completo
Resolving Canada-U.S. Trade Disputes in Agriculture and Forestry: Lessons from Lumber AgEcon
Biggs, Jeffrey; Laaksonen-Craig, Susanna; Niquidet, Kurt; van Kooten, G. Cornelis.
Prominent trade disputes between Canada and the U.S. involve agriculture and forestry, with lack of transparency caused by Canadian non-market institutions a source of U.S. objections. Though there has been a recent flurry of activity in the binational dispute resolution panel on Canadian exports of wheat, one of every six panels since 1989 has involved softwood lumber. We examine lessons from the lumber dispute to shed light on U.S. objections to the Canadian Wheat Board (CWB). We argue that U.S. lumber lobbyists will continue to use perceived Canadian institutional obscurity to keep pressure on policymakers, while the CWB system enables similar agricultural interests in to agitate for trade sanctions. Traditional strategies such as dispute resolution...
Tipo: Working or Discussion Paper Palavras-chave: International Relations/Trade; Q17; Q18; Q23; Q27.
Ano: 2005 URL: http://purl.umn.edu/37011
Imagem não selecionada

Imprime registro no formato completo
Forest Management Zone Design with a Tabu Search Algorithm AgEcon
Krcmar, Emina; Mitrovic-Minic, Snezana; van Kooten, G. Cornelis; Vertinsky, Ilan.
Increased conflicts between timber production and environmental protection led some analysts to advocate land-use segregation, often referred to as forest management zoning. The objective of zoning is to create ecologically desirable non-fragmented forest reserves and group timber production areas. We formulate an integer programming model of forest zoning that explicitly addresses clustering of spatial units allocated to timber production and reserve zones while also promoting separation of these zones. A tabu search algorithm is developed, implemented and tested using a case study. The case study results indicate that up to 5% of the net financial return is sacrificed with a 'satisfactory' grouping of units within each zone. A 'good' separation between...
Tipo: Working or Discussion Paper Palavras-chave: Forest planning; Integer programming; Reserves; Tabu search; Timber production; Zoning; Environmental Economics and Policy; Land Economics/Use; Resource /Energy Economics and Policy; C60; Q23; R14.
Ano: 2005 URL: http://purl.umn.edu/37022
Imagem não selecionada

Imprime registro no formato completo
MODELING THE EFFECT OF UNCERTAINTY ON TIMBER HARVEST: A SUGGESTED APPROACH AND EMPIRICAL EXAMPLE AgEcon
van Kooten, G. Cornelis; van Kooten, R.E.; Brown, G.L..
A method is suggested for modeling uncertainty when there is a lack of information concerning the effect of forest management decisions on tree growth. Dynamic programming is used to investigate the optimality of alternative management strategies. The model is illustrated with an empirical example for a boreal forest region of western Canada. Three tentative conclusions follow: (a) silvicultural strategies to reduce uncertainty or to increase stand growth may not be worth pursuing, at least in northern forests; (b) the discounted cost of ignoring uncertainty may be substantial if taken over the entire forest; and (c) given uncertain forest growth, flexible harvest policies are preferred to a fixed harvest age.
Tipo: Journal Article Palavras-chave: Agricultural Finance; Resource /Energy Economics and Policy; Risk and Uncertainty.
Ano: 1992 URL: http://purl.umn.edu/30740
Imagem não selecionada

Imprime registro no formato completo
ARE LOG MARKETS COMPETITIVE? EMPIRICAL EVIDENCE AND IMPLICATIONS FOR CANADA-U.S. TRADE IN SOFTWOOD LUMBER AgEcon
Niquidet, Kurt; van Kooten, G. Cornelis.
Under the U.S. Department of Commerce's 'changed circumstances' review, it is possible that the countervail duty on Canadian lumber can be lowered if administered stumpage prices are based on a transaction evidence appraisal - on actual auction data and regression analysis. The Province of British Columbia is implementing such a market-based approach to set stumpage fees, relying on timber auction data from the Small Business Forest Enterprise Program and OLS regression. We employ Program data to estimate a truncated regression model, comparing our estimates of stumpage fees with the OLS results. It turns out that the OLS approach is biased and likely results in overestimates of stumpage in some timber stands and underestimates in others. Further, we...
Tipo: Conference Paper or Presentation Palavras-chave: International Relations/Trade.
Ano: 2004 URL: http://purl.umn.edu/19985
Imagem não selecionada

Imprime registro no formato completo
ANOTHER LOOK AT THE INCOME ELASTICITY OF NON-POINT SOURCE AIR POLLUTANTS: A SEMIPARAMETRIC APPROACH AgEcon
Roy, Nilanjana; van Kooten, G. Cornelis.
In this paper, a semiparametric model is used to examine the relationship between pollution and income for three non-point source pollutants. Statistical tests reject the quadratic specification in favor of the semiparametric model in all cases. However, the results do not support the inverted-U hypothesis for the pollution-income relationship.
Tipo: Working or Discussion Paper Palavras-chave: Environmental Economics and Policy.
Ano: 2004 URL: http://purl.umn.edu/18167
Imagem não selecionada

Imprime registro no formato completo
Bayesian Model Averaging in the Context of Spatial Hedonic Pricing: An Application to Farmland Values AgEcon
Cotteleer, Geerte; Stobbe, Tracy; van Kooten, G. Cornelis.
Since 1973, British Columbia created an Agricultural Land Reserve to protect farmland from development. In this study, we employ GIS-based hedonic pricing models of farmland values to examine factors that affect farmland prices. We take spatial lag and error dependence into explicit account. However, the use of spatial econometric techniques in hedonic pricing models is problematic because there is uncertainty with respect to the choice of the explanatory variables and the spatial weighting matrix. Bayesian model averaging techniques in combination with Markov Chain Monte Carlo Model Composition are used to allow for both types of model uncertainty.
Tipo: Working or Discussion Paper Palavras-chave: Bayesian model averaging; Markov Chain Monte Carlo Model Composition; Spatial econometrics; Hedonic pricing; GIS; Urban-rural fringe; Farmland fragmentation; Environmental Economics and Policy; Farm Management; Land Economics/Use; R11; R15; C50; R14.
Ano: 2007 URL: http://purl.umn.edu/37046
Imagem não selecionada

Imprime registro no formato completo
Managing Water Shortages in the Western Electricity Grids AgEcon
Scorah, Hugh; Sopinka, Amy; van Kooten, G. Cornelis.
British Columbia’s electricity grid is comprised primarily of hydroelectric generating assets. The ability to store water in reservoirs is a significant advantage for the province allowing it to import from Alberta when prices are favourable. Alberta, has a heavily fossil-fuel based electricity portfolio, but has seen substantial growth in its wind energy capacity. However this variable energy technology impacts the province’s grid operations. Wind energy is both variable and uncertainty. However, wind energy in Alberta can be stored via BC’s reservoir systems. In this paper, we examine the extent that drought impacts the both overall operating costs as well as the cost of reducing CO2 emissions. We model the Alberta and BC interconnected grids varying...
Tipo: Working or Discussion Paper Palavras-chave: Wind power; Carbon costs; Electrical grids; Mathematical programming; Resource /Energy Economics and Policy; Q54; Q41; C61.
Ano: 2010 URL: http://purl.umn.edu/59701
Imagem não selecionada

Imprime registro no formato completo
Smoke and Mirrors: The Kyoto Protocol and Beyond AgEcon
van Kooten, G. Cornelis.
The Kyoto Protocol (KP) is considered a necessary first step towards an effective future climate accord. As argued in this paper, however, the KP will likely fail because it has too many loopholes, inadequate governance structures and insufficient compliance provisions. This view is supported by case studies of Canada, Japan and the Netherlands. These countries are unlikely to achieve their self-imposed targets, or, if they do, the costs of compliance will be unacceptably high. Consequently, the difficulty of achieving agreement to reduce global emissions by half (as required to mitigate climate change) is greatly increased.
Tipo: Working or Discussion Paper Palavras-chave: Climate change mitigation; Kyoto Protocol and implementation; Carbon sinks; Environmental Economics and Policy; Q54; Q58.
Ano: 2003 URL: http://purl.umn.edu/36992
Imagem não selecionada

Imprime registro no formato completo
ANTHROPAGENIC AND NATURAL DETERMINANTS OF THE POPULATION OF A SENSITIVE SPECIES: SAGE GROUSE IN NEVADA AgEcon
van Kooten, G. Cornelis; Eagle, Alison J.; Eiswerth, Mark E..
This paper uses Nevada data to conduct regression analyses of the relationship between sage grouse (Centrocercus urophasianus) population sizes and potential causal factors. This is policy-relevant because of current petitions for listing this species under the Endangered Species Act. A key feature is that, although monitoring of sage grouse has occurred for many decades, data collection methods and level of monitoring effort have not been consistent. To account for this feature we use, as dependent variables, standardized measures such as population counts and harvest (hunting success) per unit of effort. Preliminary findings suggest that such measures have been particularly sensitive to whether or not humans used strychnine for predator control, with...
Tipo: Working or Discussion Paper Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2004 URL: http://purl.umn.edu/18163
Imagem não selecionada

Imprime registro no formato completo
Decoupling Farm Payments: Experience in the U.S., Canada, and Europe AgEcon
Ogg, Clayton W.; van Kooten, G. Cornelis.
Commodity payments in Europe and North America are production based, encouraging greater chemical use and cropping area. Thus, each region undermines the other’s price supports at the expense of the environment. Countries can, however, sever the link between yield levels and payments. Allowing farmers to exit agriculture poses challenges for the US, but perhaps not for Canada and the EU.
Tipo: Working or Discussion Paper Palavras-chave: Decoupling; Liberalizing trade; Environment; Flexibility; Agricultural and Food Policy; Farm Management; Q15; Q17.
Ano: 2004 URL: http://purl.umn.edu/37001
Imagem não selecionada

Imprime registro no formato completo
A Perspective on Carbon Sequestration as a Strategy for Mitigating Climate Change AgEcon
van Kooten, G. Cornelis.
Tipo: Journal Article Palavras-chave: Environmental Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/94501
Imagem não selecionada

Imprime registro no formato completo
The Economics of Wind Power with Energy Storage AgEcon
Benitez, Pablo C.; Dragulescu, Lilianna; van Kooten, G. Cornelis.
We develop a nonlinear mathematical optimization program for investigating the economic and environmental implications of wind penetration in electrical grids and evaluating how hydropower storage could be used to offset wind power intermittence. When wind power is added to an electrical grid consisting of thermal and hydropower plants, it increases system variability and results in a need for additional peak-load, gas-fired generators. Our empirical application using load data for Alberta’s electrical grid shows that 32% wind penetration (normalized to peak demand) results in a net cost increase of $C5.20/ MWh, while 64% wind penetration could result in an increase of $12.50/MWh. Costs of reducing CO2 emissions are estimated to be $41-$56 per t CO2 . When...
Tipo: Working or Discussion Paper Palavras-chave: Renewable energy; Carbon costs; Hydropower storage; Mathematical programming; Environmental Economics and Policy; Resource /Energy Economics and Policy; Q40; Q42; Q50.
Ano: 2006 URL: http://purl.umn.edu/37029
Imagem não selecionada

Imprime registro no formato completo
Bioeconomic modeling of wetlands and waterfowl in Western Canada: Accounting for amenity values AgEcon
van Kooten, G. Cornelis; Withey, Patrick; Wong, Linda.
This study extends an original bioeconomic model of optimal duck harvest and wetland retention by bringing in amenity values related to the nonmarket (in situ) benefits of waterfowl plsi the ecosystem values of wetlands themselves. The model maximizes benefits to hunters as well as the amenity values of ducks and ecosystem benefits of wetlands, subject to the population dynamics. Results indicate that wetlands and duck harvests need to be increased relative to historical levels. Further, the socially optimal ratio of duck harvest to wetlands is larger than what has been observed historically. Including amenity values leads to a significant increase in the quantity of wetlands and duck harvests relative to models that focus only on hunting values.
Tipo: Conference Paper or Presentation Palavras-chave: Bioeconomic modelling; Wetland protection; Wildlife management; Nonmarket values; Prairie pothole region; Environmental Economics and Policy; Q57; C61; Q25.
Ano: 2010 URL: http://purl.umn.edu/61308
Imagem não selecionada

Imprime registro no formato completo
Economic Dynamics of Tree Planting for Carbon Uptake on Marginal Agricultural Lands AgEcon
van Kooten, G. Cornelis.
As a result of the 1997 Kyoto Protocol, afforestation of agricultural lands can be expected to take on an important role in the CO2-emissions reduction policy arsenal of some countries. To date, identification of suitable (marginal) agricultural lands has been left mainly to foresters, but their criteria fail to take into account economic nuances. In this study, an optimal control model is used to determine the optimal level of afforestation in the western Canada. The results indicate that, while planting fast–growing trees for carbon uptake on marginal agricultural land may be important, the path dynamics matter in determining whether Canada can rely on afforestation to meet its obligations under Kyoto
Tipo: Working or Discussion Paper Palavras-chave: Afforestation and climate change; Optimal control model of land use; Economics of carbon sequestration; Agribusiness; Environmental Economics and Policy; Land Economics/Use; Q23; Q27; Q54; R14.
Ano: 2004 URL: http://purl.umn.edu/36995
Imagem não selecionada

Imprime registro no formato completo
INITIAL APPLICATIONS OF FUZZY SET PROCEDURES FOR ESTIMATION OF EXPORT BASE EMPLOYMENT AgEcon
Harris, Thomas R.; Thomsen, Roy W.; van Kooten, G. Cornelis.
Current export base methods that calculate basic and non-basic employment are too restrictive because they fail to account for uncertainty involved in the process. This paper shows the assignment of industries as either basic or non-basic by the location quotient procedure does not consistently represent the data for Nevada counties. Using fuzzy set procedures and membership functions in conjunction with the location quotient allow more flexibility in terms of matching the data for each industry in the region of interest. Using fuzzy set procedures we determine the proportion of employment that is basic and non-basic in nine non-governmental industries.
Tipo: Conference Paper or Presentation Palavras-chave: Labor and Human Capital.
Ano: 2002 URL: http://purl.umn.edu/36565
Registros recuperados: 100
Primeira ... 12345 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional