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| Registros recuperados: 25 | |
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| Sudhakar, Prachi; Krishnan, Palaniappa; Bernard, John C.; Ritter, William F.. |
| The objective of this research was to predict the nitrogen-loading rate to Delaware lakes and streams using regression analysis and neural networks. Both models relate nitrogen-loading rate to cropland, soil type and presence of broiler production. Dummy variables were used to represent soil type and the presence of broiler production at a watershed. Data collected by Ritter & Harris (1984) was used in this research. To build the regression model Statistical Analysis System (SAS) was used. NeuroShell Easy Predictor, neural network software was used to develop the neural network model. Model adequacy was established by statistical techniques. A comparison of the regression and neural network models showed that both perform equally well. Cropland was... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/15824 |
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| Bernard, John C.; Pan, Xiqian; Sirolli, Ryan. |
| Today's consumers face foods whose production attributes they are often largely unfamiliar with and uncertain about. This study surveyed Delaware consumers about labeling, health risk concerns, and knowledge of five potential attributes for chicken: free-range, treated with antibiotics, irradiated, fed genetically modified (GM) feed, and GM chicken. Respondents were highly in favor of labeling all attributes, and perceived a high health risk from and had a low self-reported knowledge of many of the attributes. Gender, tobacco use, and label reading habits were significant factors in explaining the difference in responses. An analysis of survey comments further demonstrated the extent of consumer concerns. |
| Tipo: Journal Article |
Palavras-chave: Consumer/Household Economics; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2005 |
URL: http://purl.umn.edu/27714 |
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| Gifford, Katie; Bernard, John C.. |
| A consumer survey and Tobit analysis were used to determine the effect of message framing and other factors on self-reported organic food purchase likelihood. Negative framing, which emphasizes the possible negative consequences of conventional agricultural techniques, led to a "boomerang effect" that resulted in lowered purchase likelihood of organic food by consumers with high trust in food safety. Consumers with significantly higher purchase likelihood had high perceived risk from pesticides and high prior knowledge about organic methods. African Americans and those with less than a high school education had lower purchase likelihood. |
| Tipo: Journal Article |
Palavras-chave: Marketing. |
| Ano: 2004 |
URL: http://purl.umn.edu/27552 |
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| Gifford, Katie; Bernard, John C.. |
| A large segment of consumers appear to value niche products including organic, “non-GM,” “pesticide-free,” and “no antibiotics used” more in fresh products than in processed. About ten percent of the respondents were especially interested in non-GM products. These consumers feel that GM labeling is important, but felt that other types of food labels were relatively unimportant. The non-GM audience defied easy demographic profiling. Data were collected by both surveys and experimental auctions, with factor analysis and cluster analysis used to interpret the data. The survey and experimental auction data yielded different willingness-to-pay values but showed similar patterns of consumer preferences. |
| Tipo: Journal Article |
Palavras-chave: Demand and Price Analysis; Food Consumption/Nutrition/Food Safety. |
| Ano: 2008 |
URL: http://purl.umn.edu/55973 |
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| Bernard, John C.; He, Na. |
| Auction experiments are commonly used to determine consumers’ willingness to pay for various food items. While their non-hypothetical nature is a positive, market substitutes create a probable confounding of bids by field prices. This study examines the influence of field prices on bids for four foods in two versions by conducting auctions before and after large price increases in 2007. Results show that bids were capped at given field prices and were significantly higher in sessions conducted after store prices increased. Percentage premiums, however, were not significantly different across sessions, suggesting that effects of field prices could be reduced. Overall, researchers must be conscious of how field prices affect bids. |
| Tipo: Journal Article |
Palavras-chave: Auction experiments; Field prices; Organic; Bidding; Consumer/Household Economics; Institutional and Behavioral Economics; Marketing. |
| Ano: 2010 |
URL: http://purl.umn.edu/90823 |
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| Ramasamy, Saravanan; Benson, Eric R.; Bernard, John C.; van Wicklen, Garrett L.. |
| In this project, a predictive time model was developed for an Anglia Autoflow mechanical chicken catching system. At the completion of poultry growout, hand labor is currently used to collect the birds from the house, although some integrators are beginning to incorporate mechanical catching equipment. Several regression models were investigated with the objective of predicting the time taken to catch the chicken. A regression model relating distance to total time (sum of packing time, catching time, movement to catching and movement to packing) provided the best performance. The model was based on data collected from poultry farms on the Delmarva Peninsula during a six-month period. Statistical Analysis System (SAS) and NeuroShell Easy Predictor were used... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Livestock Production/Industries. |
| Ano: 2003 |
URL: http://purl.umn.edu/15830 |
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| Bernard, John C.; Pesek, John D., Jr.; Fan, Chunbo. |
| Genetically engineered (GE) soybeans first became available to farmers in 1996. Despite the common questions regarding any new crop technology, the new seeds were rapidly adopted. This study examines the characteristics of adopters, as well as yield and weed control cost changes, using survey results from Delaware farmers at the start of the 2000 season. Duration analysis reveals that earlier-adopting farmers had larger farms and tended to use computers for financial management, while regression analysis shows significantly lower weed control costs and, to a lesser extent, higher yields for GE soybeans. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 2004 |
URL: http://purl.umn.edu/31258 |
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| Bernard, John C.; Mount, Timothy D.; Schulze, William D.. |
| Restructuring of electric power markets is proceeding across the United States and in many other nations around the world. The performance of these markets will influence everything from the prices faced by consumers to the reliability of the systems. The challenges of these changes present many important areas for research. For much of the northeastern United States, restructuring proposals include, at least for the short term, the formation of a single-sided auction mechanism for the wholesale market. This research uses experimental methods to analyze how these markets may function. In the experiments, the two basic uniform price auction rules are tested under three different market sizes. Early experimental results suggest the commonly proposed... |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1998 |
URL: http://purl.umn.edu/31529 |
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| Awokuse, Titus O.; Bernard, John C.. |
| The U.S. broiler industry is highly vertically integrated and increasingly concentrated in the number of firms and production areas. These structural elements could have implications for performance and the functioning of the law of one price (LOP) across regions. This article investigates this using data on four regional markets. Cointegration results indicate that regional prices are spatially linked in the long run, but pairwise cointegration was not found, suggesting that the LOP does not hold. Causality tests confirm the relative importance of price shocks from the South. This finding is reflective of price coordination by firms with production in multiple regions. |
| Tipo: Journal Article |
Palavras-chave: Broiler prices; Causality; Cointegration; Market integration; Livestock Production/Industries; Marketing; Q13; D43; C22. |
| Ano: 2007 |
URL: http://purl.umn.edu/6324 |
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| Bernard, John C.; Gifford, Katie; Santora, Kristin; Bernard, Daria J.. |
| This study examined consumer willingness to pay for first- and second-generation genetically modified (GM) and organic foods and for non-GM foods, dependent on tolerance for GM content. Data from a survey of students were examined using a heteroskedastic two-limit Tobit model. Results showed consumers were willing to pay significantly more for organic and second-generation foods over first-generation GM foods, which suggests a niche market for second-generation GM foods may be possible. For non-GM foods, consumers were indifferent between a 100- and 99-percent threshold, but did not view 95-percent non-GM foods as more valuable than foods with unknown GM. |
| Tipo: Journal Article |
Palavras-chave: Consumer/Household Economics; Food Consumption/Nutrition/Food Safety. |
| Ano: 2009 |
URL: http://purl.umn.edu/99780 |
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| Bernard, John C.; Zhang, Chao; Gifford, Katie. |
| This research compared bids that consumers placed on non genetically modified (GM), organic, and conventional versions of food products in order to determine if the organic market well serves those seeking to avoid GM foods. Auction experiments using potato chips, tortilla chips, and milk chocolate were conducted with 79 subjects. Bids were modeled as a function of consumer demographics using a heteroskedastic tobit regression model. Results with the non-GM attribute nested into the organic characteristic showed that the latter's marginal effects were insignificant. This suggested the potential to further develop non-GM products for consumers not willing to pay extra for the remaining organic attributes. |
| Tipo: Journal Article |
Palavras-chave: Auction experiments; GM foods; Organic foods; Willingness to pay; Demand and Price Analysis. |
| Ano: 2006 |
URL: http://purl.umn.edu/10226 |
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| Registros recuperados: 25 | |
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