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| Registros recuperados: 58 | |
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| Dong, Fengxia; Hennessy, David A.; Jensen, Helen H.; Park, Timothy A.. |
| The most widely used measure of milk hygiene is Somatic Cell Count (SCC), where low SCC values indicate more wholesome milk. Dirt, often associated with grazing, carry bacteria and these bacteria can cause mastitis. Milk from cows with mastitis generally has higher SCC levels and cows with mastitis are most readily treated with antibiotics. Milk with high SCC is penalized by distributers as it is difficult to process and is not considered as wholesome in fluid markets. Grazing cows is common for many organic farmers. However, regulators prohibit antibiotic use under organic production. Intensive management protocols, maintaining equipment, and closely managing the herd’s environment offer substitutes for antibiotics use. Organic milk carries with it a... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Milk; Organic; Quality; Quantile; Food Consumption/Nutrition/Food Safety; Livestock Production/Industries. |
| Ano: 2010 |
URL: http://purl.umn.edu/61137 |
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| Park, Timothy A.; Loomis, John B.. |
| This paper empirically tested the three conditions identified by McConnell for equivalence of the linear utility difference model and the valuation function approach to dichotomous choice contingent valuation. Using a contingent valuation survey for deer hunting in California, two of the three conditions were violated. Even though the models are not simple linear transforms of each other for this survey, estimates of mean willingness to pay and their associated 95% confidence intervals around the mean were quite similar for the valuation methods. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1992 |
URL: http://purl.umn.edu/29009 |
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| Park, Timothy A.; Lohr, Luanne. |
| Organic farmers make system-level crop protection decisions that combine complementary insect, disease, nematode, and weed management strategies. Data from a national survey of U.S. organic farmers were used in a multivariate count data model to identify the farm and regional factors influencing adoption across the linked pest management categories. The results showed that weed management requires the greatest management effort by organic farmers. More intensive information-seeking and on-farm experimentation, higher educational attainment, and intensity of commitment to organic farming were positively related to the number of weed control strategies adopted. Predictions of adoption based on this model and customized to farm and region specifications... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Crop Production/Industries. |
| Ano: 2003 |
URL: http://purl.umn.edu/22070 |
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| Park, Timothy A.; Lohr, Luanne. |
| Organic farmers make system-level crop protection decisions that combine complementary insect, disease, nematode, and weed management strategies. Data from a national survey of U.S. organic farmers were used in a multivariate count data model to identify the farm and regional factors influencing the intensity of adoption across the linked pest management categories. The results showed that weed management is of greatest concern to organic farmers. More intensive information-seeking and on-farm experimentation, higher educational attainment, and intensity of commitment to organic farming were positively related to the number of weed control strategies adopted. Predictions of adoption intensity based on this model and customized to farm and region... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Farm Management. |
| Ano: 2002 |
URL: http://purl.umn.edu/16655 |
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| Lohr, Luanne; Park, Timothy A.. |
| Responses from a national survey of U.S. organic farmers indicated dissatisfaction with the extension service. An ordered probit model was used to identify the factors influencing effectiveness ratings of extension advisors by farmers. Study findings show that part-time, higher income organic farmers who used a variety of highly rated private-sector information sources rated extension providers as more effective. Farmers in the Northeast and West regions rated extension usefulness more highly than in other regions. Not accounting for these demographic components in effectiveness ratings may result in under- or overestimation of results of organic-targeted extension programs. Extension agents can improve their usefulness to organic farmers by complementing... |
| Tipo: Journal Article |
Palavras-chave: Extension service; Ordered probit model; Organic farming; Teaching/Communication/Extension/Profession. |
| Ano: 2003 |
URL: http://purl.umn.edu/31055 |
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| Park, Timothy A.; Florkowski, Wojciech J.. |
| A generalized Heckman model of purchase decisions incorporating perceived consumer quality attributes, ease of purchase, and familiarity with marketing outlets as factors influencing pecan purchases is estimated. Marketing efforts that encourage consumers to expand expenditures on nut products increase both the probability of pecan purchases and the amount purchased. Consumers who use all types of nuts in a wider variety of foods tend to purchase pecans more frequently. A diverse set of marketing outlets provides consumers with convenient sources of purchasing pecans and has a significant influence on the probability of pecan purchases but not the amount of pecans purchased. |
| Tipo: Journal Article |
Palavras-chave: Generalized Heckman model; Pecan purchases; Tobit; Demand and Price Analysis. |
| Ano: 1999 |
URL: http://purl.umn.edu/15130 |
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| Park, Timothy A.; Florkowski, Wojciech J.. |
| Timely adoption of new varieties is critical to profitable peach production, and peach quality is a primary factor driving adoption. An adoption model for peach varieties is estimated, incorporating grower evaluations of peach quality. The model identifies the impact of farm characteristics such as the farmer's quality preferences, on-farm agronomic and orchard conditions, as well as geographic effects in Georgia peach-growing regions. The relative impact of the key external and internal peach quality attributes on adoption is assessed. Decisions on new varieties are influenced by the age distribution of the orchard, information which can be used in targeting new varieties to growers. |
| Tipo: Journal Article |
Palavras-chave: Count data; Peach variety adoption; Robust standard errors; Crop Production/Industries. |
| Ano: 2003 |
URL: http://purl.umn.edu/30724 |
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| Florkowski, Wojciech J.; Park, Timothy A.; Bilgic, Abdulbaki. |
| In selecting a marketing channel for fresh peach sales, Georgia commercial peach growers choose the channel after accounting for buyers' preferences for quality attributes. Using the polychotomous selection model and survey data we identified external and internal quality attributes as essential factors influencing the choice of a marketing channel and the share of the crop marketed. Other factors influencing the choice and the volume sold through each marketing channel included orchard characteristics and the variety-determined fruit maturity. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Marketing. |
| Ano: 2003 |
URL: http://purl.umn.edu/22028 |
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| Lohr, Luanne; Park, Timothy A.. |
| Although organic farm activities seem to demand year-round employees, seasonal workers dominate the organic labor market. We use the elasticity of complementarity to assess input substitutability and predict adjustments. Farm size and farm workers are complementary inputs. Incentives that encourage farmers to expand employment of year-round and seasonal workers raise the marginal product and rates of return to organic acreage in relative wage payments. A commitment to local sales reduces organic farm incomes. A shift to local sales leads to decreased use of seasonal workers but at higher wages, with smaller adjustments in the wages of year-round workers. |
| Tipo: Report |
Palavras-chave: Elasticity of complementarity; Labor management; Organic farming; Returns to scale; Seasonal workers; Labor and Human Capital. |
| Ano: 2009 |
URL: http://purl.umn.edu/54549 |
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| Park, Timothy A.. |
| Organic farmers face heightened pressure in developing a portfolio of different marketing channels and in bargaining competitively with increasingly sophisticated marketing participants in the supply chain for organic products. This research assists producers by identifying specific farm and demographic factors that enhance earnings given the choice of marketing outlet. The two significant selectivity coefficients confirm that organic earnings when marketing through a single outlet are biased upward since farmers who are better suited to market through multiple outlets have already moved away from this marketing strategy. An accurate evaluation of the projected earnings from any marketing strategy must account for selectivity effects. |
| Tipo: Journal Article |
Palavras-chave: Marketing outlets; Multinomial logit; Organic production; Selectivity correction; Marketing. |
| Ano: 2009 |
URL: http://purl.umn.edu/57626 |
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| Gubanova, Tatiana; Lohr, Luanne; Park, Timothy A.. |
| Organic farmers, wholesalers, and retailers need price forecasts to improve their decision-making practices. This paper presents a methodology and protocol to select the best performing method from several time and frequency domain candidates. Weekly farmgate prices for organic fresh produce are used. Forecasting methods are evaluated on the basis of an aggregate accuracy measure and several out-of-sample predictive ability tests. A seasonal autoregressive method is recommended for all planning horizons. The role of better price forecasts for the agents who deal in less common organic produce is highlighted. A confirmation for the claim that the organic produce industry needs better farmgate price forecasts to grow is provided. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Demand and Price Analysis. |
| Ano: 2005 |
URL: http://purl.umn.edu/19045 |
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| Registros recuperados: 58 | |
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