Wskaźniki koncentracji jako miary konkurencji w sektorze bankowym
Concentration Ratios as Measures of Competition in the Banking Sector

Summary/Abstract: The aim of this paper is to examine the impact of changes in concentration caused by, among others, mergers and acquisitions on the level of competition in the Polish banking sector in the years 1997-2012. The Lerner index was used to measure competition in the Polish banking sector while CR5 and HHI indices were used as a measure of concentration. The article also addresses the impact of competition on risk in the Polish banking sector. The results of quantitative analysis showed that in the period before the financial crisis (1997-2007) the level of concentration had a positive impact on the level of competition, i.e. the increase in the concentration was accompanied by increase in the level of competition.

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