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Efficient decisions using DEA
Mendes, Armando B.; Silva, Emiliana; Noncheva, VeskaWorkshop "Modelos de Apoio à Decisão na Agricultura e Ambiente". Universidade dos Açores, Angra do Heroísmo, Ilha Terceira, Açores, 16 de Setembro de 2011. ; Data Envelopment Analysis (DEA) is becoming an increasingly popular management tool for decision support related to efficiency comparisons. The task of the DEA is to evaluate the relative performance of units of a system. Is not a problem solution techniq...
An Approach to Variable Aggregation in Efficiency Analysis
Noncheva, Veska; Mendes, Armando B.; Silva, EmilianaConference: The paper is selected from International Conference "Classification, Forecasting, Data Mining" CFDM 2009, Varna, Bulgaria, June-July 2009. ; In the nonparametric framework of Data Envelopment Analysis the statistical properties of its estimators have been investigated and only asymptotic results are available. For DEA estimators results of practical use have been proved only for the case of one inp...
Canonical Correlation Analysis in Variable Aggregation in DEA.
Mendes, Armando B.; Noncheva, Veska; Silva, Emiliana14º Congresso da APDIO, 7 a 9 de Setembro de 2009, Faculdade de Ciências e Tecnologia - Caparica. ; Neste trabalho documenta-se a aplicação de análise de correlações canónicas à agregação de variáveis em DEA, usando as correlações entre as variáveis originais e os componentes canónicos extraídos. É apresentado um caso de estudo que utiliza um pequeno conjunto de dados sobre explorações agrícolas na ilha tercei...
A software framework for measuring efficiency.
Noncheva, Veska; Mendes, Armando B.; Silva, EmilianaTrabalho apresentado em UseR Conference, Rennes, França, Julho 8 a 10 de 2009. ; "[...]. PAR is a software framework using a variety of models estimating efficiency and providing results explanation functionality. [...]. We are applying PAR framework to estimate the efficiency of the agricultural system in Azores [Mendes et al., 2009]. All Azorean farms will be clustered into homogeneous groups according to th...
Decision support for enhanced productivity with R software: an Azorean farms ca...
Mendes, Armando B.; Noncheva, Veska; Silva, Emiliana38th Annual Meeting of the Western Decision Sciences Institute WDSI 2009, Kauai, Hawaii, United States, 11th April 2009. ; Azores is a Portuguese insular territory where the main economic activity is dairy and meat farming. Dairy policy depends on Common Agricultural Policy of the European Union and is limited by quotas. On top of that the transformation sector had implemented a program for penalising the wors...
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