Data/hora: 22/06/2024 16:37:13

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	10/05/2013	
Data da última atualização: 	10/05/2013	
Autoria: 	MELLO, J. C. C. B. S. de; MEZA, L. A.; SILVEIRA, J. Q. da; GOMES, E. G.	
Afiliação: 	João Carlos C. B. Soares de Mello, Universidade Federal Fluminense; Lidia Angulo Meza, Universidade Federal Fluminense; Juliana Quintanilha da Silveira, Universidade Federal Fluminense; ELIANE GONCALVES GOMES, SGE.	
Título: 	About negative efficiencies in cross evaluation BCC input oriented models.	
Ano de publicação: 	2013	
Fonte/Imprenta: 	EUROPEAN JOURNAL OF OPERATIONAL RESEARCH. n. 229. 732-737 p. 2013.	
Idioma: 	Inglês	
Conteúdo: 	It will be shown in this paper that the input oriented DEA BCC model can generate negative efficiencies that are usually hidden in the model. The impact of these negative efficiencies becomes obvious when using input oriented Cross Evaluation models. With the help of an example with one input and one output, the conditions for the possible occurrence of negative efficiencies will be shown. Furthermore, we will show that a small intuitive change in the BCC multipliers model, previously presented in other papers, corrects this situation. We show why this change is used and compared it with an alternative formulation, which avoid negative efficiencies, namely the Non-Decreasing Returns to Scale (NDRS) model. We also show that the formulation studied in this paper is less restrictive than the NDRS model. The study of this variation in the DEA BCC model will be complemented with the formulation of the dual envelope model. This model changes the original frontier. Using the concept of non-observed DMUs, those variations can be graphically analyzed. We have also carried out some algebraic studies concerning benchmarks, multipliers and returns to scale.	
Palavras-Chave: 	Evaluation model.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (54476-1) - UPC - AP - DD -  -  -  - DIS