Selec？？o de variáveis em DEA aplicada a uma análise do mercado de energia eléctrica

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.