6 chap ter six sensitivity analysis commonwealth of virginia economic impact study chapter 1 introduction the purpose this is to estimate aviation impacts terrorist attacks september 11 2001 in and calculate effects those on s economy 2002 first high low scenarios are presented illustrate reduction visitor spending resultant spin off that ripple throughout second a discussion at end reviews changes jet fuel revenues collected by as consequence estimates based activities ronald reagan washington national airport dca dulles international iad year following attack two commercial airports serve district columbia metropolitan area including parts maryland west well it course difficult disaggregate occurred due 9 sluggish performances regional economies below some
