kirkpatrick said:
The problem with that analogy is that there are no competing freeways. If there were just one carrier on every route, they could set capacity to match demand with very few seats going out empty. If UA dropped from the picture, you can bet others would move in and we'd be right back where we started, after a lag time, of course.
Mk, I wasn't really setting up an analogy, just giving an example of excess capacity.
As far as the "fools rush in" idea, I'm not so sure. Granted if U or UAL were to fail, other airlines would try to fill the gap. But, you are assuming that they would simply replace the service with the same number and size of a/c and frequency of service lost in the failure. Not necessarily true. I'm not convinced that the airlines have learned nothing from the past 4 years.
AA, for instance, would have to recall furloughed flight attendants and pilots, but they would not necessarily have to acquire additional a/c. Even AA is learning the WN lesson that a/c sitting on the ground are not earning money.
Or, even if additional a/c are recalled from the desert (I'm continuing with the conceit that only AA would step in), that does not mean that the same number of seats would be brought back on line. Maybe UAL was running 5 757s a day on the ORD-DEN route (it's probably more, this is just an example) and they averaged half empty. Maybe AA would replace that service with 3-4 MD80s.
Or, say AA and UAL are already competing in the market, AA's flights are averaging a 50% load factor. I doubt they would add additional a/c to the route right away if UAL ceased service.
Any of these scenarios--more efficient use of a/c, smaller a/c, no additional a/c-- would reduce capacity.
I'm also not convinced that the LCCs are interested in serving a lot of the markets that U and UAL serve today. In some cases the LCCs don't have the right a/c to efficiently serve the market, or they are already competing in the market.
Some current U and/or UAL routes might be totally abandoned. I know that after Eastern went under, some smaller cities in the South lost all air service. Some of these have come back as regional airline stations, but that is a reduction of available seats in itself.