Submitted on: 13 May 1998.
Revised on: 31 July 1998.
Accepted on: 11 September 1998.
___________________ECOLOGICAL ECONOMICS---ELSEVIER
Submitted on: 16 November 2004.
Revised on: 04 February 2005.
Accepted on: 17 February 2005.
___________________ECOLOGICAL ECONOMICS---ELSEVIER
Submitted on: 11 August 2009.
Revised on: 07 October 2009.
Accepted on: 18 October 2009.
___________________ECOLOGICAL ECONOMICS---ELSEVIER
Submitted on: 24 August 2001.
Revised on: 10 October 2001.
Accepted on: 29 November 2001.
___________________ECOLOGICAL ECONOMICS---ELSEVIER
Submitted on: 27 July 2020.
Revised on: 24 November 2020.
Accepted on: 06 January 2021.
___________________ECOLOGICAL ECONOMICS---ELSEVIER
Submitted on: 18 September 2020.
Revised on: 18 December 2020.
Accepted on: 06 February 2021.
___________________ECOLOGICAL ECONOMICS---ELSEVIER
Submitted on: 31 August 2020.
Revised on: 29 September 2020.
Accepted on: 29 October 2020.
___________________ECOLOGICAL ECONOMICS---ELSEVIER
Submitted on: 19 November 2009.
Revised on: 21 January 2010.
Accepted on: 16 February 2010.
___________________ECOLOGICAL ECONOMICS---ELSEVIER
Submitted on: 28 February 2002.
Revised on: 22 April 2002.
Accepted on: 16 June 2002.
___________________ECOLOGICAL ECONOMICS---ELSEVIER
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