Submitted on: 13 January 2008.
Revised on: 27 January 2008.
Accepted on: 13 February 2008.
PAPERS IN REGIONAL SCIENCE---WILEY
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Submitted on: 19 July 2012.
Revised on: 11 August 2012.
Accepted on: 28 August 2012.
PAPERS IN REGIONAL SCIENCE---WILEY
http://reply.papertrans.cn/3/241/24041/24041-14.png
http://reply.papertrans.cn/3/241/24041/24041-15.png
Submitted on: 31 October 2008.
Revised on: 24 November 2008.
Accepted on: 14 December 2008.
PAPERS IN REGIONAL SCIENCE---WILEY
http://reply.papertrans.cn/3/241/24041/24041-17.png
Submitted on: 24 January 2002.
Revised on: 24 February 2002.
Accepted on: 13 March 2002.
PAPERS IN REGIONAL SCIENCE
http://reply.papertrans.cn/3/241/24041/24041-19.png
Submitted on: 13 October 2003.
Revised on: 20 October 2003.
Accepted on: 09 November 2003.
PAPERS IN REGIONAL SCIENCE