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Submitted on: 30 July 2014.
Revised on: 01 September 2014.
Accepted on: 04 October 2014.
___________________ENVIRONMENT AND DEVELOPMENT ECONOMICS
Submitted on: 25 June 1999.
Revised on: 27 July 1999.
Accepted on: 14 September 1999.
___________________ENVIRONMENT AND DEVELOPMENT ECONOMICS
Submitted on: 20 February 2005.
Revised on: 30 May 2005.
Accepted on: 22 July 2005.
___________________ENVIRONMENT AND DEVELOPMENT ECONOMICS
Submitted on: 26 February 2012.
Revised on: 21 April 2012.
Accepted on: 01 June 2012.
___________________ENVIRONMENT AND DEVELOPMENT ECONOMICS
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Submitted on: 08 March 2004.
Revised on: 05 July 2004.
Accepted on: 22 August 2004.
___________________ENVIRONMENT AND DEVELOPMENT ECONOMICS
Submitted on: 21 July 2016.
Revised on: 18 September 2016.
Accepted on: 28 October 2016.
___________________ENVIRONMENT AND DEVELOPMENT ECONOMICS