Submitted on: 23 November 2007.
Revised on: 14 February 2008.
Accepted on: 04 April 2008.
___________________International Journal of Ecological Economics & Statistics
Submitted on: 16 June 2015.
Revised on: 07 July 2015.
Accepted on: 28 August 2015.
___________________International Journal of Ecological Economics & Statistics
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Submitted on: 04 March 2000.
Revised on: 29 June 2000.
Accepted on: 16 July 2000.
___________________International Journal of Ecological Economics & Statistics
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Submitted on: 16 July 2008.
Revised on: 05 August 2008.
Accepted on: 15 August 2008.
___________________International Journal of Ecological Economics & Statistics
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