Google's acquisition of ITA should be blocked, as should all attempts at vertical integration by a search engine provider into comparison-based businesses or into any direct retailing-based businesses.
The discussion of Google and antitrust has shifted in recent weeks from relevant market and anticompetitive behavior to consumer happiness. The problem is that consumers are not always the best judges of their own welfare.
When a group of students was recently assigned to write reports on Martin Luther King, Jr., several of them learned that King had in fact been a drunken philandering con man. Where in the www did these kids search? Google, for starters.
People's opinions can be altered by changing the order in which stories are presented. Search engine companies are at best delinquent and at worst complicit in allowing this manipulation to be so easily achieved.