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	Provedor de dados AgEcon (11) Autor Mancino, Lisa (2) Todd, Jessica E. (2) Andrews, Martyn (1) Baum, Christopher F. (1) Bool, Romilee (1) Bosch, Darrell J. (1) Cornelissen, Thomas (1) Hendricks, Nathan P. (1) Kaltsas, Ioannis K. (1) Kinsey, Jean D. (1) Kristkova, Zuzana (1) Lin, Biing-Hwan (1) Mach, Jiri (1) McGuirk, Anya M. (1) Nolan, Elizabeth (1) Peterson, Jeffrey M. (1) Santos, Paulo (1) Schank, Thorsten (1) Tronstad, Russell (1) Upward, Richard (1) Mais... Palavra-chave Fixed effects (11) Food Consumption/Nutrition/Food Safety (3) Research Methods/ Statistical Methods (3) Agricultural and Food Policy (2) Consumer/Household Economics (2) Crop Production/Industries (2) Obesity (2) Agribusiness (1) Beef fattening. (1) Behavioral economics (1) C25 (1) C52 (1) CSFII (1) Calorie intake (1) Children (1) Cobb-Douglas production function (1) Contemporaneous correlation (1) Development (1) Diet quality (1) Environmental Economics and Policy (1) Mais... Tipo do documento Conference Paper or Presentation (4) Article (3) Journal Article (3) Report (1) Ano 2012 (1) 2010 (4) 2009 (1) 2008 (3) 2006 (1) 2001 (1) Mais... País United States (11) Idioma Inglês (11)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 11 Primeira ... 1 ... Última Practical fixed-effects estimation methods for the three-way error-components model AgEcon Andrews, Martyn; Schank, Thorsten; Upward, Richard. Methods for fixed-effects estimation of the three-way error-components model are not yet standard. Where possible, we make the fixed-effects methods originally developed by Abowd, Kramarz, and Margolis (Econometrica 67: 251–333) for linked worker-firm data more accessible. We also show how these methods can be implemented in Stata. There is a caveat, however. If the researcher wants to recover estimates of the error components themselves, and the number of units at the higher level of aggregation is large, memory or matrix constraints may make using Stata to estimate the components themselves infeasible. Tipo: Article Palavras-chave: Grouping; Linked employer–employee panel data; Fixed effects; Research Methods/ Statistical Methods. Ano: 2006 URL: http://purl.umn.edu/119239 Measuring the Contribution of Genetic Characteristics as an Indicator of Innovation: The Case of Corn in the USA, 1990-2009 AgEcon Nolan, Elizabeth; Santos, Paulo. Intellectual Property Rights (IPR) regimes for plant breeding are generally justified on the basis that they encourage innovation. Introduction of IPR regimes for plant varieties in the United States has led to increased concentration, but it is less clear whether IPRs have promoted useful innovation, as measured by productivity of available corn hybrids. There are difficulties in finding a satisfactory measure of innovation in plant breeding, and in this paper we propose a procedure. Results from the annual corn hybrid trials conducted by 11 US universities over the 20 years from 1990 to 2009, at 365 separate locations in the 11 states, have been collated. This set of unbalanced panel data for grain corn hybrid trials has been used in a fixed effects... Tipo: Conference Paper or Presentation Palavras-chave: Hybrid seed corn; GM traits; Varietal change; Fixed effects; Random effects; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies; O33; O34. Ano: 2010 URL: http://purl.umn.edu/61333 The Stata command felsdvreg to fit a linear model with two high–dimensional fixed effects AgEcon Cornelissen, Thomas. This article proposes a memory-saving decomposition of the design matrix to facilitate the estimation of a linear model with two high-dimensional fixed effects. A common way to fit such a model is to take into account one of the effects by including dummy variables and to sweep out the other effect by the within transformation (fixed-effects transformation). If the number of panel units is high, creating and storing the dummy variables can involve prohibitively large computer-memory requirements. The memory-saving procedure to set up the moment matrices for estimation presented in this article can reduce the memory requirements considerably. The companion Stata ado-file felsdvreg implements the estimation method, takes care of identification issues, and... Tipo: Article Palavras-chave: Felsdvreg; Linked employer–employee data; Fixed effects; Three-way error-components model; Research Methods/ Statistical Methods. Ano: 2008 URL: http://purl.umn.edu/122585 Residential Land Values in Urbanizing Areas AgEcon Kaltsas, Ioannis K.; Bosch, Darrell J.; McGuirk, Anya M.. Zoning decisions related to residential lot size and density affect residential land value. Effects of size on residential parcel value in Roanoke County, VA, are estimated with fixed effects hedonic models. Parcel size; elevation; soil permeability; proximity to urban areas, malls, and roads; and location influence parcel value, but the effects vary by value of construction and development status. Parcel value per square meter declines with increasing parcel size. The estimated relationships could be used to evaluate zoning decisions in terms of land values and tax revenues if model estimation uncertainties and responses by developers to zoning strategies are considered. Tipo: Journal Article Palavras-chave: Development; Fixed effects; Hedonic model; Property values; Residential density; Spatial econometrics; Agribusiness; Land Economics/Use; Q24; C25; C52. Ano: 2008 URL: http://purl.umn.edu/47204 Residual diagnostics for cross-section time series regression models AgEcon Baum, Christopher F.. These routines support the diagnosis of groupwise heteroskedasticity and cross-sectional correlation in the context of a regression model fit to pooled cross-section time series (xt) data. Tipo: Journal Article Palavras-chave: Fixed effects; Groupwise heteroskedasticity; Contemporaneous correlation; Research Methods/ Statistical Methods. Ano: 2001 URL: http://purl.umn.edu/115940 Food Away From Home: How much does it really influence diet quality? AgEcon Mancino, Lisa; Todd, Jessica E.; Lin, Biing-Hwan. This study confirms that eating food away from home (FAFH) adversely affects dietary intake. By looking at changes within individuals’ dietary intake over two days, thus controlling for self-selection issues, we find that FAFH causes increased caloric intake and reduced diet quality. Our estimates on the effect of specific meals show that lunch and dinner consumed away from home have the largest effect on total daily caloric intake, but that breakfast has the largest negative effect on total diet quality. In particular, eating breakfast away from home decreases intake of fruit, whole grains and dairy and increases the percent of calories from saturated fats and solid fats, alcohol and added sugar. Eating lunch and dinner away from home also reduce diet... Tipo: Conference Paper or Presentation Palavras-chave: Obesity; Food choice; Obesity; Fixed effects; Food Consumption/Nutrition/Food Safety. Ano: 2009 URL: http://purl.umn.edu/49251 U.S. Cotton Acreage Response Due to Subsidized Crop Insurance AgEcon Tronstad, Russell; Bool, Romilee. AAEA Selected Paper Tipo: Conference Paper or Presentation Palavras-chave: Subsidy per pound; Rate of return simultaneous; Panel; Fixed effects; Agricultural and Food Policy; Crop Production/Industries; Risk and Uncertainty. Ano: 2010 URL: http://purl.umn.edu/61455 The Effect of Television on the Amount and Quality of Food Children Consume AgEcon Todd, Jessica E.; Wendt, Minh. In experimental studies, children exposed to television food ads chose less healthy snacks and consumed more food overall, as compared with children exposed only to ads for toys. These findings, however, do not indicate that TV viewing causes a decrease in diet quality or an increase in weight. Other factors correlated with TV watching, such as neighborhood and parent and child characteristics, may be more to blame. We estimate the effect of an additional hour of television on total calories and the quality of food consumed during a day for children 6 to 18 years old. This research is the first to use a first difference (fixed effects) estimation strategy to investigate the impact of television on daily food consumption among children in the United States. Tipo: Conference Paper or Presentation Palavras-chave: Television; Children; Diet quality; Calorie intake; Fixed effects; CSFII; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety. Ano: 2010 URL: http://purl.umn.edu/60967 Fixed Effects Estimation of the Intensive and Extensive Margins of Irrigation Water Demand AgEcon Hendricks, Nathan P.; Peterson, Jeffrey M.. Irrigation water demand is estimated using field-level panel data from Kansas over 16 years. The cost of pumping varies over time due to changes in energy prices and across space due to differences in the depth to water. Exploiting this variation allows us to estimate the demand elasticity while controlling for field-farmer and year fixed effects. Fixed effects also allow us to control for land use without an instrument or assumptions about the distribution of errors. Our estimates of water demand are used to calculate the cost of reducing irrigation water use through water pricing, irrigation cessation, and intensity-reduction programs. Tipo: Article Palavras-chave: Fixed effects; High Plains Aquifer; Water demand; Environmental Economics and Policy; Resource /Energy Economics and Policy. Ano: 2012 URL: http://purl.umn.edu/122312 Is Dietary Knowledge Enough? Hunger, Stress, and Other Roadblocks to Healthy Eating AgEcon Mancino, Lisa; Kinsey, Jean D.. Poor diets and rising obesity rates among Americans have persisted despite increased awareness and publicity regarding the benefits of a healthy lifestyle. This analysis of consumer food choice developed a consumer demand model to illustrate how both long-term health objectives and immediate visceral influences—long intervals between meals and away-from-home eating—can affect individuals’ food choices. The model predicts that dietary knowledge will have less influence on food choices in the face of immediate visceral factors. The model predictions were tested using data from the 1994-96 Continuing Survey of Food Intake by Individuals and the companion Diet Health and Knowledge Survey. Longer intervals between meals and consumption of more food away from... Tipo: Report Palavras-chave: Behavioral economics; Food consumption; Obesity; Fixed effects; Instrumental variables.; Agricultural and Food Policy; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety; Institutional and Behavioral Economics. Ano: 2008 URL: http://purl.umn.edu/56465 Modelling The Cattle Breeding Production in the Czech Republic AgEcon Mach, Jiri; Kristkova, Zuzana. This paper proves that the use of the Cobb-Douglas form of production function is suitable for modelling the technological efficiency of selected production factors used in cattle breeding. Furthermore, it is possible to use the estimated function to analyse economic efficiency, considering also the prices of the production factors. The results of the econometric estimation show that higher initial weight affects negatively the dynamics of weight gain. Analysing the efficiency of the two main feedstuff components, i.e. the haylage and hay, it was found out that the increases in weight react inelastically with respect to the volume of feedstuffs, which is in line with the physiological limits of the animal production. The results further reveal that the... Tipo: Journal Article Palavras-chave: Cobb-Douglas production function; Panel data; Fixed effects; Gain in weight; Beef fattening.; Livestock Production/Industries; Production Economics; GA; IN. Ano: 2010 URL: http://purl.umn.edu/96873 Registros recuperados: 11 Primeira ... 1 ... Última

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