Efficient Frontier
Mostrando 13-24 de 28 artigos, teses e dissertações.
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13. 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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14. 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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15. A new genetic algorithm for portfolio optimization with cardinality constraints / Um novo algoritmo genetico para a otimização de carteiras de investimento com restrições de cardinalidade
In this work we consider the problem of determining of the efficient frontier of a portfolio using the mean-variance model subject to a cardinality constrain and to lower bounds on the amount invested in the selected assets. As this nonlinear integer programming problem is hard to solve exactly, we use a genetic algorithm, following the lines described by Ch
Publicado em: 2008
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16. Um estudo comparativo da eficiÃncia das usinas hidrelÃtricas do Brasil, utilizando a anÃlise por envoltÃria de dados â DEA / A comparative study of the efficiency of the brazilian hydroelectric units, using the Data Envelopment Analysis â DEA.
The recent structural modifications that occurred in the electric brazilian sector had, in its essence, as main purpose to guarantee a reliable energy supply. But, how to guarantee the energy supply without sufficient financial resources to invest in the construction of new electric generation plants, necessary to supply of the energy front to the expansion
Publicado em: 2008
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17. DÃficit relativo de saneamento bÃsico dos municÃpios brasileiros
This study estimates the relative deficit of water and sewage services of Brazilianâs municipalities, whose are expressed by the relative service availability. The deficit of these services is calculated using the Data Envelopment Analysis â DEA, which permits to line the efficient frontier of the water and sewage services. The municipalities that are loca
Publicado em: 2007
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18. Eficiência das escolas públicas estaduais de Minas Gerais: considerações acerca da qualidade a partir da análise dos dados do SICA e do SIMAVE
This paper develops the semi-parametrical two-stage Data Envelopment Analysis to detect the efficiency frontier of public Brazilian Minas Gerais state schools. The first stage computes the DEA-efficiency, the second one inputs the DEA results to a truncated-regression with background and wealth variables. All methods discussed here are based on recently pape
Publicado em: 2007
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19. Fronteiras Paramétricas de Eficiência para o Segmento de Transmissão de Energia Elétrica no Brasil
It analyses the cost efficiency of Brazilian electricity transmission companies by means of the stochastic frontier analysis in order to contribute for the development of an impartial and fair methodology to be applied by the Brazilian Electricity Regulatory Agency - ANEEL, as a regulation for incentive policy in the transmission industry. It develops a meth
Publicado em: 2006
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20. Study of activity carboquinones throught quantum descriptors / Estudo da atividade antineoplasica das carboquinonas atraves de descritores quanticos
The discovery of efficient treatments against cancer is one of the great challenges of science. In Brazil the cancer became the second greatest cause of death. For the year 2005 467,440 new cases of cancer are expected. The investment for the development of a modern drug is about U$ 850 millions and the treatment with those drugs varies from U$ 4,000 to U$ 1
Publicado em: 2006
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21. Descasamento entre índices de correção monetária utilizados pela indústria de real estate no Brasil um estudo empírico
The relevance of the real estate industry for Brazil is easily grasped if we observe its demand for houses, offices, schools, plants, hospitals and shopping malls. The growth of this sector is of great relevance for the development of the Brazilian economy mainly because of two crucial aspects: it provides dwelling places for the population and is a major so
Publicado em: 2006
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22. A composição da dívida pública mobiliária federal interna e os fundos de investimento no Brasil: análise dos fatores de influência
This work intends to study the relationship between Brazilian Internal Public Debt mix and Mutual Funds. In the theoretical framework, the discussion about liquidity preference theories implies considering risk averse investors. Portfolio selection is also discussed, particularly Markowitz efficient frontier. Historical data from November of 1999 to December
Publicado em: 2005
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23. Evaluation of methods parametric and non parametric in the analysis of the efficiency of the milk production. / Avaliação de métodos paramétricos e não paramétricos na análise da eficiência da produção de leite.
The objective of the study is test the most applied methods in the analysis of the relative efficiency, purposing the comparation between a producer and a group of resembled producers, or a producer with the entire sample, as the stochastic frontiers (random border) case. The tested methods were the DEA (Data Envelopment Analysis), the stochastic frontier
Publicado em: 2003
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24. Desenvolvimento de um metodo novo e geral de sintese de 1, 2, 3-triazois a partir do estudo da reatividade de compostos diazoisatinicos frente a enaminonas
A new and efficient method of 1,2,3-triazole synthesis is described in which these heterocyclics are formed through a novel nitrogen transfer from diazocarbonyl compounds to enaminones. Thus, the reaction of 3-diazo-1,3-dihydro-2H-indol-2-one derivatives (75) with enaminones (76, 82 and 81) leads to the formation of mainly 1,2,3-triazoles (77, 95 and 96) and
Publicado em: 1993