To this end, this paper examines dynamic business air travel networks
among US cities from 1993 to 2011, constructed from publically
available data using the AIRNET program. These data offer researchers
a more nuanced picture of air traffic patterns than previously available
because they focus specifically on business passengers as a distinctive
subset of all airline passengers, and because they trace the flows of
passengers between cities rather than simply the total numbers of
passengers within cities.