%0 Journal Article %T Selec£¿£¿o de vari¨¢veis em DEA aplicada a uma an¨¢lise do mercado de energia el¨¦ctrica %A Meza %A Lidia Angulo %A Mello %A Jo£¿o Carlos Correia Baptista Soares de %A Gomes %A Eliane Gon£¿alves %A Fernandes %A Artur Jos¨¦ Silva %J Investiga£¿£¿o Operacional %D 2007 %I Scientific Electronic Library Online %X in this paper we have two main goals. from a theoretical point of view we intend to develop an improvement to the dea variable selection models. it is in the variable normalisation step that this improvement takes place. from a practical point of view we intend to measure an energetic efficiency of the 27 brazilian estates. a state achieves this efficiency when it has high values of some socio-economic indexes and low level of energy consumption. we used the non-parametrical approach of data envelopment analysis (ccr and bcc models). we also used the inverted frontier dea model. %K data envelopment analysis %K variables selection %K electrical sector. %U http://www.scielo.gpeari.mctes.pt/scielo.php?script=sci_abstract&pid=S0874-51612007000100002&lng=en&nrm=iso&tlng=en