Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 7
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Estimation of Treatment Effect of Asthma Case Management Using Propensity Score Methods AgEcon
Brandt, Sylvia J.; Gale, Sara; Tager, Ira.
Objective: To estimate the treatment effect from participating in an asthma intervention that was part of the National Asthma Control Program. Study Setting: Data on children who participated in asthma case management (N=270) and eligible children who did not participate in case management (N=2,742) were extracted from a claims database. Study Design: We created 81 measures of health care utilization and 40 measures of neighborhood characteristics that could be related to participation in the program. The participation model was selected using the cross-validation-based Deletion Substitution and Addition (DSA) algorithm. We used optimal full matching for the vector of Mahalanobis’ distances and propensity scores to estimate the difference between...
Tipo: Working or Discussion Paper Palavras-chave: Asthma; Treatment effect; Health intervention; Propensity scores; Consumer/Household Economics; Health Economics and Policy; Research Methods/ Statistical Methods; I1; D13; H51; C31; C80; C81; C83.
Ano: 2009 URL: http://purl.umn.edu/53124
Imagem não selecionada

Imprime registro no formato completo
Comparisons of LSMS-ISA data collection and dissemination efforts in Central America AgEcon
Zúniga-González, Carlos Alberto.
This paper was presented in The Third Wye Global Conference. The Wye City Group on Rural Statistics and Agricultural Household Income is hosting its third global conference on agricultural and rural household statistics. The conference will be hosted by the Economic Research Service of the United States Department of Agriculture and is cosponsored by the Food and Agricultural Organization of the United Nations and the World Bank. Conference objectives Support the U.N. • Global Strategy to Improve Agricultural and Rural Statistics by highlighting international needs and opportunities to improve statistics on rural and farm households, and strengthen the process of collecting and disseminating statistics on rural and farm households in OECD and developing...
Tipo: Conference Paper or Presentation Palavras-chave: Panel Data; LSMS-ISA; MECOVI.; Research Methods/ Statistical Methods; C83; P52; E61..
Ano: 2010 URL: http://purl.umn.edu/90751
Imagem não selecionada

Imprime registro no formato completo
Producer preferences towards vertical coordination: The case of Canadian beef alliances AgEcon
Steiner, Bodo E.; Lan, Kevin; Unterschultz, James R.; Boxall, Peter C.; Laate, Emmanuel; Yang, Danyi.
A survey among cow-calf producers was conducted during 2006 in Western Canada, to assess producers’ preferences towards participation in beef alliances. Producers’ choices were analyzed by varying the degree of vertical coordination in hypothetical lliance participation, while controlling for producer and farm-specific characteristics to explore risk, transaction cost and incentive considerations in participation decisions. Estimates from the attribute-based choice experiments suggest that information sharing regarding animal performance, revenue-risk and residual claimancy are important factors for producers driving alliance choices. Overall, cowcalf producers are willing to move toward higher levels of vertical coordination based on individual animal...
Tipo: Presentation Palavras-chave: Beef value chain; Vertical coordination; Canada; Risk and Uncertainty; Q12; Q13; C83; D22..
Ano: 2012 URL: http://purl.umn.edu/122441
Imagem não selecionada

Imprime registro no formato completo
Should Surveys be Conducted Online or On Paper? A Comparison AgEcon
Hu, Wuyang; Batte, Marvin T.; Ernst, Stanley C.; Woods, Timothy A..
Internet consumer surveys have become increasingly popular in agricultural and food research. This study compares the results of an identical survey instrument implemented by mail and the Internet respectively. Aspects compared include survey logistics, timeline, costs, consumer demographic and socioeconomic features, observed univariate variables, and multivariate regression coefficient estimates and predictions. Results do reveal some differences in data collected by these two approaches. However, given the similarities between the two samples, the differences observed do not offer enough support to command either approach as superior to the other. It appears both methodologies can generate high quality data and are appropriate when used carefully.
Tipo: Conference Paper or Presentation Palavras-chave: Consumer; Internet Survey; Mailed Survey; Agribusiness; Consumer/Household Economics; Marketing; Research Methods/ Statistical Methods; C83; Q10.
Ano: 2010 URL: http://purl.umn.edu/61307
Imagem não selecionada

Imprime registro no formato completo
Households’ WTP for the Reliability of Gas Supply AgEcon
Chou, Wan-Jung; Bigano, Andrea; Hunt, Alistair; La Branche, Stephane; Markandya, Anil; Pierfederici, Roberta.
The security of natural gas supply is an important issue for all EU countries due to the region’s heavy dependence on imported supply sources and in light of energy demand for gas that is continuously increasing. Discussions have emphasised strategies for securing the supply at the macro level, e.g. diversification in supply sources, increase in storage capacity, etc. By contrast, consumers’ demand for the reliability of gas supply is rarely investigated. Hence this study was conducted to examine the economic implications associated with the security of gas supply directly to domestic consumers. Based on the choice experiment approach, household surveys were conducted in France, Italy and the UK. The results confirmed that the degree of the economic impact...
Tipo: Working or Discussion Paper Palavras-chave: Energy Security; Gas Supply; Households; Willingness to Pay; Choice Experiment; EU; Resource /Energy Economics and Policy; C35; C83; C93; D12; Q41.
Ano: 2011 URL: http://purl.umn.edu/115740
Imagem não selecionada

Imprime registro no formato completo
Non-Tariff Measures in Agri-Food Trade: What Does the Data Tell Us? Evidence from a Cluster Analysis on OECD Imports AgEcon
Disdier, Anne-Celia; van Tongeren, Frank W..
Non-tariff measures (NTMs) are playing an increasing role in international trade of agri-food trade. Although well-recognized, this aspect has not been extensively analysed at a disaggregated product level. This paper presents a quantitative analysis of the trade incidence of NTMs notified by OECD countries on 777 products and clusters these products according to three trade indicators. While the ‘protection for sale’ literature provides useful explanations, it is not completely satisfying in resolving the puzzle of cross-product differences in the occurrence of NTMs.
Tipo: Conference Paper or Presentation Palavras-chave: Non-tariffs measures; Cluster analysis; Political economy of protection; Agricultural and Food Policy; International Relations/Trade; Political Economy; C83; P16; Q17.
Ano: 2009 URL: http://purl.umn.edu/51759
Imagem não selecionada

Imprime registro no formato completo
Web-based surveys and sample frame bias in choice experiment AgEcon
Tait, Peter R.; Bicknell, Kathryn; Cullen, Ross.
Researchers are seeking effective, low cost means of gathering high quality data. Technological advancements offer new avenues for achieving this objective. Web based surveys are relatively common outside the economics discipline however applied non-market valuation practitioners have been slow to adopt this modernisation in survey methodology. The non-random exclusion of individuals from the sample frame is often cited as a major problem with web-based surveying. This paper presents a comparison of data from two choice experiment survey modes, traditional mail-and-return and web-based. The socio-demographic composition of the samples is significantly different for half the variables considered. Poe tests reveal that there are significant differences in...
Tipo: Conference Paper or Presentation Palavras-chave: Web-based surveys; Sample frame bias; Choice experiment; Environmental Economics and Policy; Research Methods/ Statistical Methods; C83; Q51.
Ano: 2009 URL: http://purl.umn.edu/109594
Registros recuperados: 7
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional