OICC Press International Journal of Mathematical Modelling & Computations 2228-6233 3 2 2013 03 21 IMPROVING THE SELECTION SYMMETRIC WEIGHTS AS A SECONDARY GOAL IN DEA CROSS-EFFICIENCY EVALUATION 149 155 EN Ghasem Tohidi Iran, Islamic Republic of Maryam Khodadadi Iran, Islamic Republic of Elham Rostamiyan Iran, Islamic Republic of Journal Article 2013 03 21 Recently, some authorsproposed the use of symmetric weightsfor computing the elements of cross-efficiency matrix. In spite ofthe fact that the proposed method decreases the number of zeroweights, a large number of zero weights may still exist among inputand output symmetric weights. To decrease the number of input andoutput symmetric weights, this paper improves the proposed secondarygoal model. The improved method generates more acceptable results inthe ranking process of the decision making units (DMUs). Finally, anumerical example is provided to illustrate the applicability of theproposed method.