Relying upon highly territorially disaggregated data taken at labour market areas, the paper explores the relationship between bank performances and finan- cial stability of the banking system taking into account the role of market concentration. The z-score is used as financial stability indicator, while the performance of financial intermediaries is measured using a parametric method recently developed (Kumbhakar et al. 2014). The empirical evidence shows a positive relationship between bank perfor- mance and financial stability and supports the ‘concentration–stability’ view for non- cooperative banks only when concentration is measured on the whole sample of banks. Differences in the performance–stability nexus seem to depend more on the type of banks rather than different levels of market concentration. Higher market concentration of co- operative banks affects systemic stability by reducing the z-scores of non-cooperative banks, supporting the hypothesis that the presence of non-profit-maximizing entities can pull down stability of other financial institutions.
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