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	Provedor de dados AgEcon (5) ArchiMer (1) Autor Lopez, Jose Antonio (3) Malaga, Jaime E. (3) Chen, Guohua (1) Kreuter, Frauke (1) Li, Bing (1) Mouret, Véronique (1) Rince, Jean-philippe (1) Sauriau, Pierre-guy (1) Valliant, Richard (1) Zhu, Ning (1) Mais... Palavra-chave Stratified sampling (6) Food Consumption/Nutrition/Food Safety (4) Agricultural and Food Policy (3) Censored demand system (3) Consumer/Household Economics (3) Demand and Price Analysis (3) Q11 (3) Two-step estimation procedure (3) Agribusiness (2) Forecast of Mexican imports (2) Forecast of Mexican meat consumption (2) International Relations/Trade (2) Meat analysis at the table cut level (2) Mexican meat demand elasticities (2) Research Methods/ Statistical Methods (2) U.S. meat exports to Mexico (2) Adult equivalent scales (1) Bootstrap standard errors (1) China (1) Cluster sampling (1) Mais... Tipo do documento Conference Paper or Presentation (3) Article (1) Text (1) Thesis or Dissertation (1) Ano 2009 (4) 2007 (1) 1989 (1) País United States (5) France (1) Idioma Inglês (5) Francês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 6 Primeira ... 1 ... Última Organisation trophique de la malacofaune benthique non cultivée du bassin ostréicole de Marennes-Oléron ArchiMer Sauriau, Pierre-guy; Mouret, Véronique; Rince, Jean-philippe. Stock assessment of wild soft-bottom molluscs formed part of a study carried out in the Marennes-Oléron oyster-farming bay. The sampling design was based on a stratified random sampling. The results are presented using three descriptors: species richness, abundance and biomass. In spring 1984, wild molluscs corresponded to nearly 20% of oyster-rearing stocks. Knowledge of the feeding behaviour and geographical distribution of the various trophic groups within the bay enables to estimate trophic competition with the cultivated species (Crassostrea gigas and Mytilus edulis). Five trophic groups were specified: suspension-feeders, deposit-feeders, suspension/deposit feeders, carnivores and herbivores. Their organization in terms of species number seemed to... Tipo: Text Palavras-chave: Mollusque benthique; Organisation trophique; Compétition trophique; Suspensivore; Échantillonnage stratifié; Soft-bottom mollusc; Trophic system; Trophic competition; Suspension-feeder; Stratified sampling. Ano: 1989 URL: http://archimer.ifremer.fr/doc/1988/publication-2874.pdf Estimation of a Censored Demand System in Stratified Sampling: An Analysis of Mexican Meat Demand at the Table Cut Level. AgEcon Lopez, Jose Antonio; Malaga, Jaime E.. Evidence of meat trade in the form of table cuts suggests that consumer preferences and tastes vary across meat cuts. Unlike previous studies, this paper estimates demand elasticities at the table cut level from a Mexican survey of household incomes and expenditures, which is a stratified sample. The study uses the two-step estimation of a censored demand system proposed by Shonkwiler and Yen (1999) but incorporates stratification variables into the estimation procedure. Parameter estimates are reported and its standard errors are approximated by using the bootstrap procedure. Tipo: Conference Paper or Presentation Palavras-chave: Censored demand system; Two-step estimation procedure; Stratified sampling; Mexican meat demand; Elasticities; Adult equivalent scales; Bootstrap standard errors; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Q11. Ano: 2009 URL: http://purl.umn.edu/46294 A survey on survey statistics: What is done and can be done in Stata AgEcon Kreuter, Frauke; Valliant, Richard. This article will survey issues in analyzing complex survey data and describe some of the capabilities of Stata for such analyses. We will briefly review key elements of survey design and explain the effects of different design features on bias and variance. We compare different methods of variance estimation for stratified and clustered samples and discuss the handling of survey weights. We will also give examples for the practical importance of Stata’s survey capabilities. Tipo: Article Palavras-chave: Cluster sampling; Complex design; Nonresponse; Stratified sampling; Variance estimation; Weights; DEFECT; NHANES; NHIS; PISA; Research Methods/ Statistical Methods. Ano: 2007 URL: http://purl.umn.edu/119252 Sampling Theory of Food Safety System AgEcon Li, Bing; Chen, Guohua; Zhu, Ning. We introduce the stratified sampling method, and put forward theoretical unbiased estimation of stratified sampling program, as well as the model and statistics of experimental design test. We also discuss the establishment of dietary exposure model, pollutant distribution model, and risk evaluation model. Finally, we present some methods for sampling design in China. Tipo: Thesis or Dissertation Palavras-chave: Exposure model; Pollutant model; Stratified sampling; Experimental design; Risk evaluation model; China; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety; Research Methods/ Statistical Methods. Ano: 2009 URL: http://purl.umn.edu/53588 Forecast and Simulation Analysis of Mexican Meat Consumption at the Table Cut Level: Impacts on U.S. Exports. AgEcon Lopez, Jose Antonio; Malaga, Jaime E.. This is the poster presentation. Please refer to the full paper for details. Tipo: Conference Paper or Presentation Palavras-chave: Forecast of Mexican meat consumption; Forecast of Mexican imports; U.S. meat exports to Mexico; Mexican meat demand elasticities; Meat analysis at the table cut level; Censored demand system; Two-step estimation procedure; Stratified sampling; Agribusiness; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; International Relations/Trade; Q11. Ano: 2009 URL: http://purl.umn.edu/52382 Forecast and Simulation Analysis of Mexican Meat Consumption at the Table Cut Level: Impacts on U.S. Exports. AgEcon Lopez, Jose Antonio; Malaga, Jaime E.. An analysis of current and forecasted Mexican meat consumption and imports is presented at the table cut level of disaggregation. Unlike previous studies, this study uses adult equivalence scales, a price imputation approach, a consistent censored demand system, and estimation techniques from stratified sampling. The results indicate that most Mexican consumption and imports of table cuts of meats grow at different rates. In addition, Mexico seems to be following the U.S. preferences for beef cuts, but it does not seem to be following the U.S. preferences for chicken cuts. The study may help U.S. and Canadian meat exporters in forecasting future exports to Mexico, conducting long-term meat investment decisions, or identifying trends in the consumption of... Tipo: Conference Paper or Presentation Palavras-chave: Forecast of Mexican meat consumption; Forecast of Mexican imports; U.S. meat exports to Mexico; Mexican meat demand elasticities; Meat analysis at the table cut level; Censored demand system; Two-step estimation procedure; Stratified sampling; Agribusiness; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; International Relations/Trade; Q11. Ano: 2009 URL: http://purl.umn.edu/51986 Registros recuperados: 6 Primeira ... 1 ... Última

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