Cost Frontier
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. THE EM ALGORITHM FOR STANDARD STOCHASTIC FRONTIER MODELS
ABSTRACT The Expectation-Maximization (EM) algorithm is developed for the stochastic frontier models most used in practice with cross-section data. The resulting algorithms can be easily programmed into a computer and are shown to be worthy alternatives to general-purpose optimization routines currently used. The algorithms for the half normal and the expone
Pesqui. Oper.. Publicado em: 02/12/2019
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2. Main factors that affect the economic efficiency of broiler breeder production
This study aimed at identifying the factors that affect the economic efficiency of broiler breeder production using the analysis of stochastic profit frontier function. Data were collected in 48 broiler breeder farms contracted by a commercial company located in southwestern Paraná, Brazil. The collected data refer to the last batch of fertile eggs that was
Rev. Bras. Cienc. Avic.. Publicado em: 2015-03
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3. Oceanografia e Química: unindo conhecimentos em prol dos oceanos e da sociedade
The marine environment is certainly one of the most complex systems to study, not only because of the challenges posed by the nature of the waters, but especially due to the interactions of physical, chemical and biological processes that control the cycles of the elements. Together with analytical chemists, oceanographers have been making a great effort in
Quím. Nova. Publicado em: 2013
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4. Gestão financeira e econômica da propriedade rural com multiproduto
Farmers have always neglected management procedures in their enterprises in detriment to initiatives regarding production technology. Overall, producers and technicians know the answer to what, how and when to produce, but they dont know the cost or profitability of this technology. The present study shows the importance of the sustainability of agricultural
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2012
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5. ANÃLISE DE EFICIÃNCIA TÃCNICA DOS GASTOS PÃBLICOS COM SAÃDE NO ESTADO DO CEARÃ NA MICRORREGIÃO DE BATURITÃ / ANALYSIS OF TECHNICAL EFFICIENCY OF EXPENDITURES WITH PUBLIC HEALTH IN THE STATE OF CEARA MICROREGION BaturitÃ
This study aims to analyze the efficiency of public spending on health in the state of Cearà in Microregion Baturità in the period 2006 to 2010. To this end, we used the database system Public Health Budget (SIOPS) and indicators of the program by Covenant Health, prioritized and monitored by the Municipal Health, intercropped with tool use Data Envelopmen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/01/2012
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6. A Fruticultura Irrigada de pequenos produtores no Baixo-Açu: Uma análise da eficiência de custo
Este trabalho tem como objetivo analisar a eficiência de custos dos produtores do projeto de irrigação Baixo-Açu e identificar os determinantes dessa eficiência. Para alcançar esses objetivos estimou-se, numa primeira etapa, uma fronteira de custos pelo método não paramétrico de análise de envoltória de dados (Data Envelopment Analysis DEA), e men
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/04/2010
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7. Construção de espectrômetro de emissão atômica com atomização eletrotérmica em filamento de tungstênio (WCAES)
It is here discussed the development of a low cost analytical instrument with capacity for metals determination using atomic emission measurements in an electrothermal atomization system with a tungsten coil atomizer. The main goal was to show a new frontier for using this atomizer and to demonstrate that the simple instrumental arrangement here proposed has
Química Nova. Publicado em: 2010
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8. Study of mixers fertilizers plants localization in brazilian Center-West region using a linear programming model / Estudo de localização de fábricas misturadoras de adubo na região Centro-Oeste brasileira utilizando um modelo de programação linear
Currently, the brazilian agribusiness is responsible for about 37% of the national PIB and face up to two of the great challenges in its constant growth which are the high dependence of chemical products (fertilizers) to expand its agricultural frontier and consequently, the distance (and transports costs) that this frontiers impose to be overcome, as much f
Publicado em: 2009
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9. Medidas de custo-eficiência nos serviços subnacionais de segurança pública : uma abordagem com o uso de fronteiras estocásticas
This paper measures the efficiency of the subnational public security system estimating a stochastic cost frontier from a panel data (2001 to 2006). The given method innovates Brazilian economic public security research, focused primarily on determinants of murder rates, when comparing the deviations from efficiency frontier of the twenty-seven units of the
Publicado em: 2008
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10. UMA ABORDAGEM BAYESIANA PARA O CÁLCULO DOS CUSTOS OPERACIONAIS EFICIENTES DAS DISTRIBUIDORAS DE ENERGIA ELÉTRICA / A BAYESIAN APPROACH TO ESTIMATE THE EFFICIENT OPERATIONAL COSTS OF ELECTRICAL ENERGY UTILITIES
This thesis presents the main results of the cost efficiency scores of 60 Brazilian electricity distribution utilities. Based on yardstick competition scheme, it was applied a Kohonen Neural Networks (KNN) to identify and to group the similar utilities. The KNN results are not deterministic, since the estimated weights are randomly initialized. Thus, a Monte
Publicado em: 2008
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11. On the use of unmanned aerial vehicle and the development of a data acquisition system of law cost for atmospheric sounding / Utilização de veículos aéreos não tripulados e desenvol-vimento de um sistema de aquisição de dados de baixo custo para sondagem atmosférica
This work describes the construction of an unmanned aerial vehicle (UAV) with electrical propulsion and instrumentation in order to obtain the vertical and horizontal profiles by measuring temperature, pressure, and GPS location, in surface atmosphere layer between two heterogeneous surfaces near terrain. Using embedded electronic, one developed and built a
Publicado em: 2008
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12. Modelos de fronteira estocástica: uma abordagem bayesiana / Stochastic frontier models: a bayesian approach
A firma é o principal agente econômico para a produção e distribuição de bens e serviços. Seu constante investimento em melhorias e o aperfeiçoamento de sua capacidade produtiva, visando tornar-se cada vez mais eficiente, transforma-se em um determinante central do bem estar econômico da sociedade. O processo de medir a ineficiência de firmas basei
Publicado em: 2008