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    Merger and acquisitions in South African banking: a network DEA model

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    Date
    2017
    Author
    Wanke, Peter
    Maredza, Andrew
    Gupta, Rangan
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    Abstract
    Banking in South Africa is known for its small number of companies that operate as an oligopoly. This paper presents a strategic fit assessment of mergers and acquisitions (M&A) in South African banks. A network DEA (Data Envelopment Analysis) approach is adopted to compute the impact of contextual variables on several types of efficiency scores of the resulting virtual merged banks: global (merger), technical (learning), harmony (scope), and scale (size) efficiencies. The impact of contextual variables related to the origin of the bank and its type is tested by means of a set of several robust regressions to handle dependent variables bounded in 0 and 1: Tobit, Simplex, and Beta. The results reveal that bank type and origin impact virtual efficiency levels. However, the findings also show that harmony and scale effects are negligible due to the oligopolistic structure of banking in South Africa.
    URI
    https://doi.org/10.1016/j.ribaf.2017.04.055
    http://hdl.handle.net/10394/27629
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    • Faculty of Economic and Management Sciences [1428]

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