Key: OAI =
Office of Airline Information; OST = Office of the Secretary of
Transportation.
Notes: For columns 1 and 3, profit data were obtained from
TranStats. For columns 2 and 4, profit data (for Majors) were obtained from Airline Quarterly Financial Review (various issues).
* Significant at the 95 percent level. There is a 5% chance of
concluding that a positive or negative association exists when in fact it
does not.
