Abstract
AbstractThis study investigates the regional differences in how consolidation has affected the efficiency of Shinkin banks, a representative cooperative financial institution in Japan, using the stochastic meta‐frontier approach based on cost and profit functions. The findings support the quiet life hypothesis that a significant negative relationship exists between efficiency‐adjusted Lerner indices and cost efficiency. By contrast, the relation between market power and profit efficiency is consistently positive. Moreover, independent Shinkin banks not involved in mergers exhibit higher costs and profit efficiency than other banks, suggesting that mergers can deteriorate efficiency.
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