Submitted on: 26 October 2005.
Revised on: 30 December 2005.
Accepted on: 16 February 2006.
___________________JOURNAL OF REGIONAL SCIENCE---WILEY
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Submitted on: 25 September 2014.
Revised on: 31 October 2014.
Accepted on: 18 November 2014.
___________________JOURNAL OF REGIONAL SCIENCE---WILEY
Submitted on: 25 July 2015.
Revised on: 30 August 2015.
Accepted on: 03 October 2015.
___________________JOURNAL OF REGIONAL SCIENCE---WILEY
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Submitted on: 23 July 2010.
Revised on: 24 September 2010.
Accepted on: 15 November 2010.
___________________JOURNAL OF REGIONAL SCIENCE---WILEY
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