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Submitted on: 14 March 2009.
Revised on: 20 April 2009.
Accepted on: 06 May 2009.
Research in Transportation Economics
Submitted on: 09 June 2017.
Revised on: 18 July 2017.
Accepted on: 07 August 2017.
Research in Transportation Economics
Submitted on: 10 November 2006.
Revised on: 20 November 2006.
Accepted on: 12 December 2006.
Research in Transportation Economics
Submitted on: 31 May 2019.
Revised on: 14 June 2019.
Accepted on: 08 July 2019.
Research in Transportation Economics
Submitted on: 20 February 2007.
Revised on: 29 March 2007.
Accepted on: 13 April 2007.
Research in Transportation Economics
Submitted on: 14 May 2001.
Revised on: 26 June 2001.
Accepted on: 04 July 2001.
Research in Transportation Economics
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Submitted on: 21 June 2002.
Revised on: 22 July 2002.
Accepted on: 15 August 2002.
Research in Transportation Economics