This paper discusses alternative concepts of productivity and methods of measurement. Different measures are appropriate for different questions. Partial factor productivity measures, such as the ever-popular labour productivity, are appropriate where disaggregate operational performance is of...

This paper compares unit cost competitiveness of the world's 22 major airlines over the 1986-93 period. First, a unit cost index for aggregate output is computed via a multilateral index procedure. A translog variable cost function is estimated and used to decompose the unit cost differentials...