On CNN, the fascinating World of airline upgrade auctions

In this week's CNN article I write about the fascinating World of airline ancillaries, that is, all the extra revenue airlines make besides selling plane tickets.

In particular, I focus on upgrade auctions. Some firms have developed the technology that allows passengers to pro-actively bid for seat upgrades at prices below the standard rate.

The key is making it in an elegant way, so that the airline can make some extra money by moving economy class passengers to empty business class seats without risking a devaluation of its premium product.

Read it here to see how it works!