This study examines the cost implications of competition over existing US freight rail lines by testing for the condition of cost subadditivity. The study finds: (1) that there are economies associated with vertically integrated roadway maintenance and transport, suggesting that separating the...

This study examines airfares for flights serving small and large communities, and attempts to explain their differences using a 10 per cent sample of all tickets sold nationwide in the year prior to the terrorist attacks of 11 September 2001. The study finds airfares that are 11 per cent higher...