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Submitted on: 17 January 2004.
Revised on: 17 April 2004.
Accepted on: 11 June 2004.
___________________JOURNAL OF TRANSPORT ECONOMICS AND POLICY
Submitted on: 03 January 2018.
Revised on: 10 March 2018.
Accepted on: 26 March 2018.
___________________JOURNAL OF TRANSPORT ECONOMICS AND POLICY
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Submitted on: 09 December 2023.
Revised on: 15 January 2024.
Accepted on: 10 March 2024.
___________________JOURNAL OF TRANSPORT ECONOMICS AND POLICY
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