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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Gastos em turismo dos domicílios brasileiros: uma análise de seus determinantes a partir da pesquisa de orçamentos familiares 2002-2003

Isis Andrade de Souza, Poema 31 January 2011 (has links)
Made available in DSpace on 2014-06-12T17:19:59Z (GMT). No. of bitstreams: 2 arquivo493_1.pdf: 476830 bytes, checksum: 6e0ee12891f13c0a4fcae0b7bb72c8e9 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2011 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Este trabalho tem como principal objetivo verificar a estrutura dos gastos em turismo realizados pelos domicílios brasileiros e seus principais determinantes, utilizando-se Pesquisa de Orçamentos Familiares, POF 2002-2003, como sua principal base de dados. Todavia, em um primeiro momento, realizou-se uma breve análise da dimensão econômica do turismo no Brasil em termos de ocupações e renda do trabalho gerada no setor. Na estimação dos determinantes dos gastos foi utilizado o modelo de Heckman, devido à existência de viés de seleção na equação dos gastos. Os resultados comprovaram, de um modo geral, que a decisão de realizar alguma viagem não-rotineira está positivamente relacionada com a renda per capita domiciliar, número de pessoas no domicílio, principalmente se os chefes tiverem filhos com mais de 14 anos. Além disso, as pessoas com maior nível de instrução, do sexo masculino e com disponibilidade de cartões de crédito têm maiores chances de realizar algum gasto turístico. Já em relação à magnitude desses gastos, comprovou-se que, o turismo é um bem normal, com elasticidade menor do que 1. Ainda, as pessoas de idades mais elevadas, do sexo masculino, solteiras e com maiores níveis de educação são as que mais gastam em turismo no Brasil
2

Impact of Migration on Welfare of Migrant Sending Households in Selected Rural Areas of Zimbabwe

Zvendiya, Ronald 29 March 2022 (has links)
The New Economics of Labour Migration theory, recognizes family participation in migration decisions as a strategy for moving out of poverty, thus signaling potential welfare linkages between migrants and family members left behind. The current study investigates the impact of migration on welfare of migrant sending households in rural Zimbabwe using cross-sectional data. The study employed a Counterfactual approach and utilized two stage Heckman selection model to control for selection bias. The results indicated that on average, migration impacts household welfare positively but the welfare gains are not evenly distributed among households. Overall, the welfare of households with migrants would have been 5 percentage points lower if migrant members had stayed at home. Based on the findings, the main recommendation is that policy makers need to consider the removal of de facto and de jure migration restrictions.
3

Here today, gone tomorrow : an empirical analysis of attrition and recall bias in labour market data

Taylor, Rebecca L. January 2000 (has links)
No description available.
4

The Growth Potential of the 'Next-11': The Importance of Emerging Markets for Canadian Agrifood Trade

Cairns, Alexander Philip 16 September 2011 (has links)
The capacity of Canada’s export-oriented agrifood sectors to cope with contemporary challenges may hinge on their ability to identify new export markets. This thesis uses an import demand model, developed by Hallak (2006), to assess how per capita expenditure on Canadian agrifood exports is influenced by income growth and the presence of a preferential trade agreement for a group of emerging economies, known as ‘the Next-11.’ Results reveal that while as a group the Next-11 does not appear to be distinct from other income groups or the BRICs in terms of their expenditures on agrifood imports, Vietnam and South Korea demonstrate expenditure elasticities notably higher then other Next-11 and BRIC members. Finally, the findings cast doubt on the capacity of PTAs to enhance Canadian agrifood trade. However, this result may be indicative of Canada’s longstanding commitment to multilateral trade liberalization and the corresponding delay in the adoption of PTAs.
5

Data mining of market information to assess at-home pork demand

Asatryan, Armen A. 30 September 2004 (has links)
This study analyzes the economic and demographic patterns of at-home pork consumption for representative individuals over 18 years of age in the United States. Three data sets purchased by the National Pork Board (NPB) are mined for this purpose: (1) National Eating Trends (NET) data from National Panel Diary (NPD) on individuals' intake and their demographic characteristics; (2) weekly retail prices for fresh meats and fresh pork cuts from FreshLook; and (3) weekly retail prices for processed pork products from A.C. Nielsen. Heckman sample selection models are used to find demographic, health, and attitudinal/lifestyle patterns of consumption of twelve fresh and processed pork products as well as beef, chicken, and seafood. In the fall, individuals have a higher probability of eating beef, chicken, pork tenderloin, and bacon, but a lower probability of eating fresh seafood, canned ham, and smoked ham relative to the spring. The New England region has the highest likelihood of eating fresh pork, beef, chicken, seafood, pork roasts, pork tenderloin, and pork hotdogs. Blacks, on average, eat more fresh and processed pork, chicken, pork sausage, bacon, and canned ham, but less beef relative to whites. Concern about serving food with fat is negatively related with the likelihood of eating processed pork, lunchmeat, ham, and bacon, but it is positively related with the likelihood of eating pork hotdogs. A three-stage selectivity-adjusted censored LA/AIDS model is developed and estimated to find demand-price relationships for: (1) fresh meats (pork, beef, chicken, and seafood) and (2) nine fresh and processed pork cuts. However, aggregate fresh meats are substitutes for each other in at-home market, but there are substantial complementarities between pork cuts. Pork sausage is the major competitor for the processed products, pork roasts and pork tenderloin, but a major complement for pork ribs. There is relatively week substitutability between pork and beef, and relatively strong substitutability between pork and chicken and between beef and chicken. This could suggest opportunities for some joint marketing efforts between pork and beef commodity interests. This information can be used as a guide for marketing strategists for targeting and promotion as well as for category management of the disaggregated pork products.
6

Diferenciais de rendimentos do trabalho entre as regiões metropolitanas de Salvador e de porto Alegre: uma avaliação empírica baseada nos procedimentos de de Oaxaca

Freitas, Urandi Roberto Paiva January 2008 (has links)
85f. / Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2013-03-13T14:19:40Z No. of bitstreams: 1 Urandi%20Freitasseg.pdf: 367597 bytes, checksum: 379c423d59414f475717843578df81aa (MD5) / Approved for entry into archive by Vania Magalhaes(magal@ufba.br) on 2013-03-14T12:24:13Z (GMT) No. of bitstreams: 1 Urandi%20Freitasseg.pdf: 367597 bytes, checksum: 379c423d59414f475717843578df81aa (MD5) / Made available in DSpace on 2013-03-14T12:24:13Z (GMT). No. of bitstreams: 1 Urandi%20Freitasseg.pdf: 367597 bytes, checksum: 379c423d59414f475717843578df81aa (MD5) Previous issue date: 2008 / A presente dissertação tem como propósito avaliar o hiato de rendimentos provenientes do trabalho entre a Região Metropolitana de Salvador (RMS) e a de Porto Alegre (RMPA), tomando como base os microdados da Pesquisa de Emprego e Desemprego (PED, 2006) . Para mensurar tal diferencial, estima-se, por meio de métodos econométricos, as equações de rendimentos do tipo minceriana, contendo informações de características produtivas e não produtivas de trabalhadores das duas regiões pesquisadas. A fim de tornar o trabalho mais consistente aplica-se o método de correção de viés de seletividade da amostra chamado de Procedimento de Heckman (1979), uma vez que o trabalho contempla apenas trabalhadores ocupados com rendimentos positivos. Para mensurar os possíveis diferenciais de rendimentos do trabalho procede-se ao método de decomposição de Oaxaca (1973). Os resultados apontaram a partir do modelo proposto, que a RMPA leva vantagem sobre a RMS em três categorias: homem, mulher e não branco, enquanto a RMS tira proveito apenas na categoria branco. Em todas as categorias, independente da região, o fator regionalização mostra-se mais forte que o fator atributo produtivo. / Salvador
7

The Impact of Bankruptcy Exemptions for Retirement Assets

Baker, Matthew 21 May 2013 (has links)
When filing for personal bankruptcy, an individual can, in almost all cases, claim an exemption for retirement assets.  Using the Survey of Consumer Finances from 2007 and 2010, we test the theory that highly educated or financially sophisticated households allocate more resources to retirement assets under conditions of higher probability of filing for personal bankruptcy.  This hypothesis stems from the concept of asset sheltering, in which an individual will demonstrate a preference for assets that are exempt from a particular risk. To address our hypothesis, we run a Heckman model on the Survey of Consumer Finances data.  Our results provide evidence to match our theory for only highly educated or financially sophisticated individuals, conditional on owning retirement assets.  That is, we observe highly educated and financially sophisticated households allocate more resources to retirement accounts when they are at higher risk for bankruptcy.  Other characteristic groups do not demonstrate a similarly strong relationship between the probability of filing for bankruptcy and the level of retirement assets. / Master of Science
8

An investigation on the occurrence of selection bias in public procurement in sample Brazil / Uma investigaÃÃo sobre a ocorrÃncia de viÃs de seleÃÃo amostral em concursos pÃblicos no Brasil

Anderson Passos Bezerra 10 June 2012 (has links)
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / The objective of this paper turns to evaluation of the factor that may influence the chances of approval in an aptitude test for admission in public jobs. Using a database obtained from a aptitude test realized by the Banco do Nordeste do Brasil, occurred in 2003 to mid-level positions, and from Pesquisa Nacional por Amostra de DomicÃlio (PNAD) database, also 2003, sought to draw a map of the determinats to approval in the aptitude test, however the hypothesis of sample selection occurrence was raised, since the enrollment process in the aptitude test was coupled with certain socioeconomic characteristics needing so, be considered in the analysis of the approval factors, or in other way, we could obtain biased results, if the problem (sample selection) occurs. To obtain success in our demand, we use an adaptation of the methodology proposed by Heckman, with an addition that was employed in a discrete choice model, because ours dependent variables are dummies, being to the enrollment process, if he enrolls or not and for the aptitude process, if he has succeeded or not. We estimated three models, being two models, considering the sample selection problem, and another without the selectivity. The results found pointed to nonexistence of the selectivity problem, confirming other papers on the same theme. / O objetivo do presente trabalho volta-se para a avaliaÃÃo de fatores que possam influenciar as chances de aprovaÃÃo em um concurso pÃblico para o provimento de cargos pÃblicos. Com a utilizaÃÃo de uma base de dados obtida a partir de um concurso realizado pelo Banco do Nordeste do Brasil, ocorrido em 2003 para cargos de nÃvel mÃdio e da Pesquisa Nacional por Amostra de DomicÃlio (PNAD) tambÃm de 2003, buscou-se traÃar um mapa dos fatores que influenciam a aprovaÃÃo no concurso, contudo levantou-se a hipÃtese da ocorrÃncia de viÃs de seleÃÃo amostral, posto que o simples processo de inscriÃÃo no concurso estaria atrelado a certas caracterÃsticas sÃcio econÃmicas devendo portanto ser levado em consideraÃÃo quando da anÃlise dos fatores para aprovaÃÃo, pois de outra forma obterÃamos resultados enviesados caso tal problema (viÃs de seleÃÃo) ocorra. Para lograr Ãxito em nossa demanda utilizamos uma adaptaÃÃo da metodologia proposta por Heckman, com a diferenÃa que empregamos modelos de escolha binÃria, pois nossas variÃveis dependentes tratavam-se de variÃveis dummies, sendo para o processo de inscriÃÃo se o indivÃduo inscreveu-se ou nÃo e para o processo de seleÃÃo se o candidato foi aprovado ou nÃo. Foram realizadas trÃs estimaÃÃes sendo duas que levam em consideraÃÃo a problemÃtica do viÃs de seletividade e uma terceira em que ignora-se tal possibilidade. Os resultados encontrados apontam para a inexistÃncia do viÃs corroborando estudos realizados anteriormente relativos ao mesmo tema.
9

我國政府資訊服務採購案件影響因素之分析 / An Analysis on the Determinants of Government Information Services Procurement

陳慶隆 Unknown Date (has links)
國內有關採購案件之決標金額與底價金額之實證研究文獻,多將相關資料逕以迴歸方式直接處理而獲致相關結論,未曾考量樣本偏誤對迴歸結果的影響。本研究利用內政部99年1月至104年8月資訊服務勞務採購案件數據,針對1,061件採購案件資料進行分析,為避免因樣本選擇不當可能產生的估計誤差,我們利用Heckman二階段估計法,先估計押標金對採購案件是否決標的影響,再進一步分析影響決標金額與底價金額的要因。經過選樣誤差修正後,我們發現決標金額與底價金額都有受到選樣誤差的影響,表示過往以計量模型進行決標金額與底價金額影響因素的實證研究,由於未考量押標金的扭曲效果,其研究結果似有再檢視必要。而實證結果也發現,勞務與工程案件之決標金額與底價金額的影響因素並不完全相同,故現行以工程思維為架構的政府採購法,確有再修正之必要。
10

Uma análise do emprego no setor da construção civil nos estados do nordeste brasileiro: qualidade do emprego formal e o retorno da educação

Cavalcante Junior, Roberto Gomes 28 September 2012 (has links)
Made available in DSpace on 2015-05-08T14:44:49Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 410234 bytes, checksum: 4c23c2bea4eb7899dddb30c83bd1fbeb (MD5) Previous issue date: 2012-09-28 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The Construction Industry has gained prominence on the national scene due to its ability to generate employment, and absorb much of the disqualified labor. On that perspective, this research aims to measure the quality of formal employment and quantify the impact of schooling on income of Construction Industry workers in the states of Northeast Brazil. In order to do that, there will be built two independent, however related, essays. The first proposes the implementation of a Quality Index of Formal Employment - IQEF in order to monitor the behavior of the quality of employment in the formal labor market in this sector. The second essay aims to investigate the return of schooling in relation to the worker's salary. It will be adopted Mincer s yield equations (1974) and two estimation procedures based on empirical models. The first aims to exclude possible bias problem with selectivity and sample and was estimated based on the Heckman Model, considering that the salary depends not only on the labor supply and wages offered by the market contracted, but also on the implicit reservation wage of the agent. The second model uses Quantilic Regression technique which allows to analyze the contemporary association between the dependent variable (salary) with the explanatory variables (education and other individual characteristics) in different quantiles of the conditional distribution. The main characteristics found on this study are that, despite the growth in the number of workers, the Construction Industry did not show an evolution in the quality of formal employment in the northeastern states and that schooling has a positive and significant impact on estimates of all states the Northeast to the Heckman model. The technique of quantilic regression showed that both for workers with higher wages as for workers with lower wages the return to education is higher than the return of workers with wages close to the average. / O setor da Construção Civil vem ganhando destaque no cenário nacional devido a sua capacidade de geração de emprego, além de absorver uma boa parte da mão de obra pouco qualificada. Nessa perspectiva, esta pesquisa objetiva mensurar a qualidade do emprego formal e quantificar o impacto da escolaridade sobre o rendimento dos trabalhadores do setor da Construção Civil nos estados do Nordeste brasileiro. Para tanto, serão construídos dois ensaios independentes, porém, relacionados. O primeiro propõe a aplicação de um Índice de Qualidade do Emprego Formal - IQEF, visando acompanhar o comportamento da qualidade do emprego no mercado de trabalho formal deste setor. No segundo ensaio busca-se investigar o retorno da escolaridade em relação ao salário do trabalhador. Para tal, serão adotadas as equações de rendimento de Mincer (1974) e dois processos de estimação baseados em modelos empíricos. O primeiro busca excluir possível problema de viés com seletividade amostral e foi estimado baseado no Modelo de Heckman, considerando que o salário dependa não apenas da oferta de trabalho oferecida pelo mercado e o salário contratado, mas também do salário de reserva implícito do agente. O segundo modelo utiliza a técnica de Regressão Quantílica a qual permite analisar a associação contemporânea entre a variável dependente (salário) com as variáveis explicativas (escolaridade e outras características individuais) nos diversos quantis da distribuição condicional. As principais características encontradas nesta pesquisa são que, apesar do crescimento no número de trabalhadores, o setor da Construção Civil não apresentou uma evolução na qualidade do emprego formal nos estados nordestinos e que a escolaridade tem um impacto positivo e significativo nas estimações de todos os estados do Nordeste para o Modelo de Heckman. A técnica de Regressão Quantílica mostrou que tanto para os trabalhadores com salários mais altos quanto para os trabalhadores com os salários mais baixos o retorno da educação é superior do que o retorno dos trabalhadores com salário próximo à média.

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