new england regional aviation system plan technical paper 3 trends and trendbreakers december 2002 the louis berger group inc sh&e unisys r2a a strauss wieder claire barrett associates page 1 table of contents introduction 2 industry airline overview definitions an in crisis 5 diverging fortunes 7 economics us domestic 9 strategies frequency market coverage hubs 10 pricing 12 4 costs 15 load factors 17 6 network carrier share 18 air service 19 cargo considerations potential to reduce demand 20 increase 21 other 22 general 23 fleet mix use 24 s role economy 25