Purpose: The optimization of investment portfolios is a topic of major importance in financial decision making, with many relevant models available in the relevant literature. The purpose of this paper is to perform a thorough comparative assessment of different bi-objective models as well as...

Purpose – The purpose of this paper is to examine the efficiency and productivity of a Greek bank's branches. Design/methodology/approach – The sample consists of 458 branches of a Greek commercial bank, operating in 13 regions of Greece over the period 2002‐2005, a total of 1,795...