Unlike studies investigating only the characteristics of bank regulation that affect the concurrent static efficiency of banks, this paper uses a dynamic, slacks-based measure to study the persistent and intertemporal effects on the dynamic efficiency of banks in the long run. The authors find the following main results. First, the cost-to-income ratio has a significant negative effect on bank efficiency. Second, banks having higher loan-to-deposit and current ratios are more efficient than those with lower ratios. Third, the capital adequacy, provision coverage, and loan-loss provision ratios do not significantly affect bank efficiency. [ABSTRACT FROM AUTHOR]