Originally Posted by
gofer
It is usually considered by the authorities that 30 to 33% of the market constitutes the starting point of a possible monopoly.
Hardly likely that AF/KL/DL/NW/CO and Alitalia have that percentage of the European market, is it?
They probably don't have that much of the total European market, but you can bet they have far more than that fraction of the France<-->Italy market (for example). So a competition ruling might insist that they surrender some of the slots they use for these routes, with the proviso that these slots are to be awarded to competitors to increase choice between (e.g.) CDG and MXP.