Title:	Construction of a smoothed DEA frontier.
Authors:	MELLO, J. C. C. B. S. DE LINS, M. P. E. GOMES, E. G.
Affiliation:	JOÃO CARLOS CORREIRA BAPTISTA SOARES DE MELLO, UFF; MARCOS PEREIRA ESTELLITA LINS, UFRJ; ELIANE GONÇALVES GOMES, CNPM.
Date Issued:	2002
Citation:	Pesquisa Operacional, v. 22, n. 2, p. 183-201, 2002.
Description:	It is known that the DEA multipliers model does not allow a unique solution for the weights. This is due to the absence of unique derivatives in the extreme-efficient points, which is a consequence of the piecewise linear nature of the frontier. In this paper we propose a method to solve this problem, consisting of changing the original DEA frontier for a new one, smooth (with continuous derivatives at every point) and closest to the original frontier. We present the theoretical development for the general case, exemplified with the particular case of the BCC model with one input and one output. The 3-dimensional problem is briefly discussed. Some uses of the model are summarised, and one of them, a new Cross-Evaluation model, is presented.
Keywords:	Fronteira suavizada Razões de compensação Método de Ritz
Notes:	(Edição especial de DEA e MCDA).
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPM)