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| Registros recuperados: 79 | |
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| Kim, Seung Gyu; Cho, Seong-Hoon; Roberts, Roland K.; Claassen, Roger. |
| The main objective of this research is to propose a data-driven approach to estimate the amenity values of restoring urban forest landscapes at potential target sites. The approach allows establishing the overall price-driving time relationship between the amenity values attributable to both deforested and forested areas and their proximities to housing locations within a given community. Establishing the overall price-driving time relationship is important because the hedonic price model cannot be used to estimate the amenity values of yet to be restored urban forest landscapes that do not exist at the time of housing sales transactions. We estimated the sum of the differences between amenity values of deforested and forested areas on housing prices... |
| Tipo: Working Paper |
Palavras-chave: Urban forest landscapes; Spatial hedonic model; Travel distance; Land Economics/Use. |
| Ano: 2012 |
URL: http://purl.umn.edu/123552 |
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| Roberts, Roland K.; Garrod, Peter V.. |
| When obtaining nitrogen (N), phosphate (P) and potash (K), purchasing decisions concerning the quantity and the form of each plant nutrient must be made. Logit models are estimated for the choice-of-form decision by considering those variables influencing the probability that plant nutrients will be purchased in Tennessee as part of a mixed fertilizer or as direct application materials. Parameter and elasticity estimates can be used by fertilizer manufacturers and distributors to anticipate changes in the composition of demand for plant nutrients in Tennessee. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1987 |
URL: http://purl.umn.edu/30219 |
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| Roberts, Roland K.; Douglas, Peggy V.; Park, William M.. |
| Much of the solid waste stream in the United States is generated by metropolitan areas, while associated landfills are often located in adjacent rural communities. Landfill disposal of municipal solid waste often creates external costs to nearby residents. Contingent valuation was used to estimate external costs of siting a landfill in the Carter community of Knox County, Tennessee. Estimates of annual external costs were $227 per household. Household income, size, years in the community, and distance from the proposed landfill and the respondent's education, sex, and perception of health risks were important in determining a household's willingness to pay to avoid having a landfill in the Carter community. Also, households whose drinking water supplies... |
| Tipo: Journal Article |
Palavras-chave: Public Economics. |
| Ano: 1991 |
URL: http://purl.umn.edu/30048 |
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| Roberts, Roland K.. |
| Several studies have estimated plant nutrient demand functions for nitrogen, phosphate, and potash. All included own-price effects but excluded prices of jointly applied nutrients. In this study, nutrient demand functions, which include prices of all three nutrients, are estimated for Tennessee by seemingly unrelated regression. Results suggest that cross-price effects are important in determining plant nutrient demand, at least in the case of Tennessee, and that multicollinearity need not be a hindrance in all cases to including cross-price effects in plant nutrient demand models. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1986 |
URL: http://purl.umn.edu/29771 |
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| Walton, Jonathan C.; Roberts, Roland K.; Lambert, Dayton M.; Larson, James A.; English, Burton C.; Larkin, Sherry L.; Martin, Steven W.; Marra, Michele C.; Paxton, Kenneth W.; Reeves, Jeanne M.. |
| Technology adoption in precision agriculture has received considerable attention, while abandonment has received little. Our objective was to identify factors motivating adoption and abandonment of precision soil sampling in cotton. Results indicate younger producers who farmed more cotton area, owned more of their cropland, planted more non-cotton area, used a computer, or used a Personal Digital Assistant (PDA) were more likely to adopt precision soil sampling. Those with more cotton area or who owned livestock were more likely to abandon, while those who used precision soil sampling longer, used a PDA, or used variable-rate fertilizer application were less likely to abandon. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Crop Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/6215 |
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| Cho, Seong-Hoon; Roberts, Roland K.; Kim, Seung Gyu. |
| The following hypothesis was tested: Willingness to bear a negative water impairment externality differs between those who do and those who do not receive economic benefit from the impairment source, e.g., a paper mill. The hypothesis was tested using a hedonic analysis of ambient water quality in two discrete housing markets in the Pigeon River Watershed, which have been polluted by the operation of a paper mill. The results suggest that North Carolina residents of the subwatersheds with impaired river, who experience economic benefits from the paper mill in addition to harmful effects, do perceive the pollution as a negative externality, whereas they may have a willingness to bear a similar type of negative externality associated with impaired streams.... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Negative Externalities; Water quality; Spatial hedonic model; Environmental Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/103762 |
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| Roberts, Roland K.; English, Burton C.; Larson, James A.; Cochran, Rebecca L.; Goodman, W. Robert; Larkin, Sherry L.; Marra, Michele C.; Martin, Steven W.; Reeves, Jeanne M.; Shurley, W. Donald. |
| Precision Farming by Cotton Producers in Six Southern States: Results from the 2001 Southern Precision Farming Survey |
| Tipo: Report |
Palavras-chave: Cotton; Precision farming; Survey; Agribusiness; Farm Management; Production Economics; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2002 |
URL: http://purl.umn.edu/91331 |
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| Roberts, Roland K.; Heady, Earl O.. |
| Several past studies used time series data to estimate price elasticities of demand for fertilizer or nutrient use on all crops in the United States or by region. In this study, demand functions for nitrogen, phosphorous and potassium applied per acre of corn, wheat and soybeans in the United States were estimated, using a combination of autoregressive least squares and seemingly unrelated regression techniques. The results suggest that the demands for nitrogen, phosphorous and potassium applied to corn are price elastic, while similar responses for wheat and soybeans are price inelastic. Nitrogen and phosphorous applied per acre of corn were found to be positively related to government sponsored acreage diversion. The estimated elasticities could provide... |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1982 |
URL: http://purl.umn.edu/32277 |
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| Walton, Jonathan C.; Larson, James A.; Roberts, Roland K.; Lambert, Dayton M.; English, Burton C.; Larkin, Sherry L.; Marra, Michele C.. |
| This research analyzed the adoption of Personal Digital Assistants (PDA) and handheld Global Positioning System (GPS) devices in cotton production. Analysis using a logit model found that younger farmers who used a crop consultant, remote-sensing, variable-rate fertilizer, and reported greater yield variability had a higher probability of adopting. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm Management; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2008 |
URL: http://purl.umn.edu/6839 |
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| Registros recuperados: 79 | |
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