Robyn, D., Reitzes, J., Moselle, B. (2005). Beyond Open Skies: The Economic Impact of a U.S.-EU Open Aviation Area. In: Deep Integration. Brussels: CEPS, 2005. Pp. 50-73.
http://transatlantic.sais-jhu.edu/bin/s/v/DeepIntegration-OpenSkies.pdf. Accessed March 12, 2010  

Over the long term, a US-EU Open Aviation Area would:

• increase transatlantic travel by up to 11 million passengers a year:
  a 24% increase;
• boost intra-EU travel by up to an additional 35.7 million passengers a year:
  a 14% increase;
• increase economic output in directly related industries by up to $8.1 billion a year; and
• create about $5.2 billion a year in consumer benefits through lower fares and increased travel, with more than half of those benefits going to transatlantic passengers.