Submitted on: 18 December 2005.
Revised on: 08 April 2006.
Accepted on: 26 April 2006.
___________________Economics-The Open Access Open-Assessment E-Journal
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Submitted on: 16 April 2001.
Revised on: 20 June 2001.
Accepted on: 09 August 2001.
___________________Economics-The Open Access Open-Assessment E-Journal
http://reply.papertrans.cn/1/80/7986/7986-14.png
Submitted on: 11 October 2002.
Revised on: 02 January 2003.
Accepted on: 02 February 2003.
___________________Economics-The Open Access Open-Assessment E-Journal
Submitted on: 21 October 2004.
Revised on: 28 January 2005.
Accepted on: 03 March 2005.
___________________Economics-The Open Access Open-Assessment E-Journal
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Submitted on: 03 November 2004.
Revised on: 18 February 2005.
Accepted on: 19 March 2005.
___________________Economics-The Open Access Open-Assessment E-Journal
Submitted on: 25 June 2019.
Revised on: 23 October 2019.
Accepted on: 03 December 2019.
___________________Economics-The Open Access Open-Assessment E-Journal