We propose a set of consistency conditions that frontier efficiency measures should meet to be most useful for regulatory analysis or other purposes. The efficiency estimates should be consistent in their efficiency levels, rankings, and identification of best and worst firms, consistent over...

This paper uses a stochastic cost frontier to examine the scale economies, cost efficiencies, and technological change of three payments instruments--check, automated clearinghouse (ACH) transfers, and Fedwire processing--provided by the Federal Reserve over the period 1990-94. We find evidence...