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    Hierarchical groups DEA cross-efficiency and TOPSIS technique: An application on mobile money agents locations
    (Inderscience Publishers, 2022) Muvingi, Jacob; Peer, Arshad Ahmud Iqbal; Lotfi, Farhad Hosseinzadeh; Özsoy, Volkan Soner
    Ranking of efficient decision-making units (DMUs) allows a further analysis of the data envelopment analysis (DEA) efficient DMUs, where otherwise a high number of efficient DMUs can be identified. The current research seeks to segregate the efficient DMUs through the use of seven cross-efficiency (CE) ranking approaches. The choice of using those CE approaches was meant to reduce bias associated with the use of a single criterion. The seven approaches were extended to suit a situation were DMUs are structured in a two-level hierarchical grouping. The CE of level 1 DMUs was adjusted with the performance of the level 2 DMUs. Variations in the seven adjusted CE ratings were observed. In a bid to ensure complete ranking, the technique for order preference by similarity to ideal solution (TOPSIS) ranking method was combined with the adjusted CE ratings.