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Submitted on: 18 August 2005.
Revised on: 27 August 2005.
Accepted on: 08 September 2005.
Socio-Economic Review
Submitted on: 25 August 2009.
Revised on: 04 October 2009.
Accepted on: 23 October 2009.
Socio-Economic Review---OXFORD UNIV PRESS
Submitted on: 13 September 2018.
Revised on: 27 September 2018.
Accepted on: 18 October 2018.
Socio-Economic Review
Submitted on: 25 August 2019.
Revised on: 29 September 2019.
Accepted on: 11 October 2019.
Socio-Economic Review---OXFORD UNIV PRESS
http://reply.papertrans.cn/3/283/28228/28228-26.png
http://reply.papertrans.cn/3/283/28228/28228-27.png
Submitted on: 21 May 2010.
Revised on: 04 July 2010.
Accepted on: 17 July 2010.
Socio-Economic Review---OXFORD UNIV PRESS
Submitted on: 21 March 2004.
Revised on: 23 April 2004.
Accepted on: 28 April 2004.
Socio-Economic Review
Submitted on: 10 June 2019.
Revised on: 18 July 2019.
Accepted on: 01 August 2019.
Socio-Economic Review