1David GiUen, Ashish LalLThe economics of the lntemet, the new e- conomy and opportunities for airports [J].Journal of Air Transport Manage- ment, 2002, 8(1): 49-62.
2Ceyhun Elgin.lntemet usage and the shadow economy:. Evidence from paneldata [J].Economic Systems,2013, 37(1):111-121.
