Submitted on: 12 June 2014.
Revised on: 29 September 2014.
Accepted on: 31 October 2014.
___________________ENVIRONMENTAL & RESOURCE ECONOMICS
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Submitted on: 26 March 2002.
Revised on: 14 May 2002.
Accepted on: 09 July 2002.
___________________ENVIRONMENTAL & RESOURCE ECONOMICS
Submitted on: 10 June 2018.
Revised on: 05 July 2018.
Accepted on: 30 August 2018.
___________________ENVIRONMENTAL & RESOURCE ECONOMICS
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