1. How 9_11 forced efficiency upon supply chains;SUPPLYCHAINDIVE,2017, 11
2. Benchmarking US all-cargo carriers: A productivity and cost competitiveness analysis,2016
3. An empirical study of cost drivers in the U.S. airline industry;The Accounting Review,1993
4. Productivity growth and some of its determinants in the deregulated U.S. railroad industry;Southern Economic Journal,2003
5. U.S. air carriers and work-rule constraints – Do airlines employ an allocatively efficient mix of inputs?;Research in Transportation Economics,2014