Introducing a model to determine convex-efficient DMUs

In this paper, we introduce a model to evaluation DMUs in the PPS (production possibility set), whit three properties. (a) The observed activities (xj,yj), (j = l , . . . , n ) belong to PPS; (b) Any convex combination of activities in PPS belongs to PPS; (c) PPS is the smallest set that satisfying the principles (a) and (b).Then we show that the proposed model is equivalent to additive model.

Keywords:

Data envelopment analysis (DEA) , production possibility set (PPS) , Additive model