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- Finding closest targets in non-oriented DEA models: the case of convex and non-convex technologiesPublication . Constantino Portela, Maria Da Conceição; Borges, Pedro Castro; Thanassoulis, EmmanuelThis paper draws attention for the fact that traditional Data Envelopment Analysis (DEA) models do not provide the closest possible targets (or peers) to inefficient units, and presents a procedure to obtain such targets. It focuses on non-oriented efficiency measures (which assume that production units are able to control, and thus change, inputs and outputs simultaneously) both measured in relation to a Free Disposal Hull (FDH) technology and in relation to a convex technology. The approaches developed for finding close targets are applied to a sample of Portuguese bank branches.