MIT airline data has AA pilots flying 3% more than DL pilots in 2014 and 7% more than UAL pilots in 2014.

The MIT data doesn't show a 10-15% increase in hours per pilot, at DL or UA, after PBS was implemented.

DL said the total job cost of PBS, with after the fact analysis, was in the 2-3% range.

UAL said the majority of the jobs 'lost' was actually in other areas, like changes to vacation, from the contract changes and the jobs lost to PBS implementation was low.