A major part of the problem may be the rent charged the concessionairs. I see a significient turn over at DCA and IAD. My understanding is they leave because the rent is just too high.

That may be why :Quote:
For our price comparisons we used Food and Beverage establishments at The Empire State Building, and shops in the vicinity of 8th Ave. between 42nd and 43rd. We also used 5 malls in NJ, SI mall, and local Newark Merchants. The shopping service we used did find water priced at $3.79 in Manhattan.

they may be paying a similar rent.