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The Author the analyses dependence on the level of rivalry of the level of efficiency in the article in the sector of cooperative banks in Poland. He is resulting from obtained data that the increase in the level of rivalry was causing the drop in the sector of cooperative banks of the level of efficiency. It is necessary to underline that this relationship is strong and statistically essential.
W artykule przedstawiono związek miedzy poziomem konkurencji a poziomem koncentracji w sektorze banków spółdzielczych w Polsce. Z obliczonych współczynników korelacji i regresji wynika, że zależność pomiędzy badanymi zmiennymi była dodatnia, jednak statystycznie nieistotna.
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