Submitted on: 09 August 2016.
Revised on: 30 November 2016.
Accepted on: 23 December 2016.
___________________International Review of Environmental and Resource Economics
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Submitted on: 15 December 2002.
Revised on: 10 February 2003.
Accepted on: 24 February 2003.
___________________International Review of Environmental and Resource Economics
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Submitted on: 21 June 2001.
Revised on: 16 July 2001.
Accepted on: 07 September 2001.
___________________International Review of Environmental and Resource Economics
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