Why ∏A = gUG + min(k-g, (1-g)(1-r)) equals low airline fares

"Research shows that the optimum time to book your airline ticket is eight weeks before travelling

It is a question that anyone booking a holiday or..."

Click here (http://www.guardian.co.uk/world/2010/aug/22/airline-ticket-eight-week-rule) to read the full story