This is a condensed version of the original article.
Congestion at airports imposes large costs on airlines and their passengers. A key reason for congestion is that an airline schedules its flights without regard to the costs imposed on other airlines and their passengers. As a result, during some time intervals, airlines schedule more flights to and from an airport than that airport can accommodate and flights are delayed.
Figure 6 in this article has been revised: The combination of bids closest to Vickrey prices was incorrectly shown as 19 (bidder 1) and 13 (bidder 2), but has been corrected to 17 (bidder 1) and 15 (bidder 2).