Korean banking sector. We examine the effects of market concentration on bank efficiency and competition for the period of … market concentration has not improved bank efficiency through scale economies or scope economies. Instead, recent mergers … 1992-2006. Three different indicators of bank inefficiency are used in this study, including X-inefficiency that is derived …

impact of efficiency, as well as concentration, on banking competition measured by the Net Interest Margin (NIM), controlling … the level of competitiveness and efficiency. We estimate X-inefficiency for a sample of banks operating in the European … Union using the stochastic frontier approach. We relate efficiency levels to market competitiveness employing Panzar & Rosse …

-based causal relationship between banks' cost efficiency and competition via data envelope analysis (DEA) using the generalized … causality between competition and cost efficiency (higher efficiency results in a higher level of competition). The DEA results … the previous year (2020), with competition forcing efficiency via the cutting of costs. …