Some recent studies have been investigating the existence of market power in the European banking system, in general, and the Spanish banking industry, in particular. Although results are mixed, the evidence suggests some commercial banks and savings banks benefit from monopoly rents. Some other...

This study examines the role of investment in environmental production practices for both environmental performance and energy efficiency over time. We employ a network DEA approach that links successive production technologies through intertemporal investment decisions with a period by period...