The well-coordinated terrorist attacks on Sept. 11, 2001 presented the world with a new aviation security threat: the capture of aircraft in flight to be used as human-guided missiles. The two previous threats—hijacking an aircraft for ransom and putting a bomb aboard an aircraft—had led to...

This concluding paper discusses key aspects of the five research papers presented at this Roundtable in terms of their policy applications. It notes problems concerning how policy makers make use of economic analysis findings, and then summarizes the breadth of macro-, meso- and micro-economic...

The concept of the general purpose (GP) lane has dominated modern highway thinking and practice in OECD countries, especially for limited-access highways such as inter-city motorways and urban expressways, whether tolled or non-tolled. This paper raises the question of whether, in some...