(a). Average closeness of drivers (red bars) and average fraction of the aggregate lending accounted for by the driver banks (yellow bars), for the different aggregation time scales. Both values are obtained after averaging over all available network snapshots at the considered time resolution. Maximum closeness is achieved for the monthly network. (b). The fraction of top lender banks which are also drivers of the network: not only the drivers are not hubs, they are not even the larger banks, especially at wider aggregation scales.