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Submitted on: 11 February 2005.
Revised on: 15 March 2005.
Accepted on: 26 March 2005.
QME-Quantitative Marketing and Economics
Submitted on: 28 March 2010.
Revised on: 22 April 2010.
Accepted on: 01 May 2010.
QME-Quantitative Marketing and Economics
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Submitted on: 20 March 2004.
Revised on: 18 April 2004.
Accepted on: 12 May 2004.
QME-Quantitative Marketing and Economics
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Submitted on: 12 March 2005.
Revised on: 29 March 2005.
Accepted on: 20 April 2005.
QME-Quantitative Marketing and Economics
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