|
|
|
| Registros recuperados: 2.166 | |
|
|
| Jacobsen, Roy M.; Sell, Randall S.; Watt, David L.. |
| Sunflower research in North Dakota focuses on variety testing. Additional research has been conducted on cost-effective cultural practices, possible use to produce a red dye food colorant, and the estimated economic impact of banning an insecticide. Variety testing has been conducted at most state experiment sites in North Dakota, including, Casselton Agronomy Seed Farm, Carrington Research Extension Center, Langdon, Minot, Williston, Dickinson, and Hettinger Experiment Stations. A comparison of the impact of conventional tillage and no tillage on sunflower in North Dakota has been conducted at Dickinson Experiment Station and USDA-ARS Northern Great Plains Research Laboratory, Mandan. A large number of diseases and pests may infect sunflower. The North... |
| Tipo: Report |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods. |
| Ano: 1992 |
URL: http://purl.umn.edu/51172 |
| |
|
|
| McDonald, Scott; Punt, Cecilia. |
| This paper provides an overview of the main research contributions of the past decade using general equilibrium models to analyse agricultural issues in South Africa. The methodological developments since the change to democracy ten years ago are viewed in the context of developments in this area of research carried out internationally. It will be shown in this paper that the modelling and computing techniques have vastly improved during the past decade, both in an ongoing attempt to refine existing models, and in an attempt to extend the modelling framework to make provision for issues that cannot be sufficiently captured in the standard comparative static models. These extensions include dynamic modelling, global modelling, environmental modelling and... |
| Tipo: Journal Article |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 2005 |
URL: http://purl.umn.edu/31721 |
| |
|
| |
|
|
| Cicia, Gianni; Colantuoni, Francesca. |
| Several researches evaluated consumers’ Willingness To Pay (WTP) for each meat traceable attribute, generating a lot of information in this regard, although related to the conditions of each study. In light of this, WTP estimates for traceability characteristics largely differ across the literature, leading sometimes to contrasting interpretations. Seeking a full, meaningful statistical description of the findings of a collection of studies, the meta‐analysis allows us analyzing the consistency across studies and controlling for factors thought to drive variations in WTP estimates. The meta‐analysis has been conducted of 23 studies that, in aggregate, report 92 valuations for WTP. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agribusiness; Agricultural and Food Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Research Methods/ Statistical Methods. |
| Ano: 2010 |
URL: http://purl.umn.edu/100593 |
| |
|
| |
|
| |
|
| |
|
|
| Hailpern, Susan M.; Visintainer, Paul F.. |
| Logistic regression is perhaps the most widely used method for adjustment of confounding in epidemiologic studies. Its popularity is understandable. The method can simultaneously adjust for confounders measured on different scales; it provides estimates that are clinically interpretable; and its estimates are valid in a variety of study designs with few underlying assumptions. To those of us in practice settings, several aspects of applying and interpreting the model, however, can be confusing and counterintuitive. We attempt to clarify some of these points through several examples. We apply the method to a study of risk factors associated with periventricular leucomalacia and intraventricular hemorrhage in neonates. We relate the logit model to... |
| Tipo: Journal Article |
Palavras-chave: Cc; Cci; Cs; Csi; Logistic; Logit; Relative risk; Case–control study; Odds ratio; Cohort study; Research Methods/ Statistical Methods. |
| Ano: 2003 |
URL: http://purl.umn.edu/116084 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Kim, Lois G.; White, Ian R.. |
| Survival data are most frequently analyzed by the intention-to-treat principle. However, presenting a compliance-adjusted analysis alongside the primary analysis can provide an insight into the effect of the treatment for those individuals actually complying with their randomized intervention. There are a number of methods for this type of analysis. Loeys and Goetghebeur (2003) use proportional hazards techniques to provide an estimate of the treatment effect for compliers when compliance is measured on an all-or-nothing scale. This methodology is here made available through a new Stata command, stcomply. |
| Tipo: Journal Article |
Palavras-chave: Stcomply; Compliance; Proportional hazards; Research Methods/ Statistical Methods. |
| Ano: 2004 |
URL: http://purl.umn.edu/116246 |
| |
|
| |
|
|
| Cicia, Gianni; Colantuoni, Francesca. |
| Several researches evaluated consumers’ Willingness To Pay (WTP) for each meat traceable attribute, generating a great deal of information in this regard, although specific to the conditions of each study. In light of this, WTP estimates for traceability characteristics differ across the literature, leading sometimes to contrasting interpretations. Seeking a full, meaningful statistical description of the findings of a collection of studies, the meta-analysis allows us to analyze consistency across studies and control for factors thought to drive variations in WTP estimates. The meta-analysis has been conducted using 23 studies that, in aggregate, report 88 valuations for WTP. Our results, aside from releasing unconditional information on the WTP for... |
| Tipo: Journal Article |
Palavras-chave: Meta-analysis; Food traceability; Willingness to Pay; Agribusiness; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Institutional and Behavioral Economics; Production Economics; Research Methods/ Statistical Methods; Risk and Uncertainty. |
| Ano: 2010 |
URL: http://purl.umn.edu/97028 |
| |
|
| |
| Registros recuperados: 2.166 | |
|
|
|
