Submitted on: 11 March 2007.
Revised on: 06 April 2007.
Accepted on: 03 June 2007.
___________________Electronic Commerce Research---SPRINGER
Submitted on: 03 December 2015.
Revised on: 28 December 2015.
Accepted on: 08 February 2016.
___________________Electronic Commerce Research---SPRINGER
Submitted on: 15 August 2010.
Revised on: 22 October 2010.
Accepted on: 21 December 2010.
___________________Electronic Commerce Research---SPRINGER
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Submitted on: 17 November 2024.
Revised on: 11 December 2024.
Accepted on: 12 January 2025.
___________________Electronic Commerce Research---SPRINGER
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Submitted on: 29 October 2004.
Revised on: 22 January 2005.
Accepted on: 17 February 2005.
___________________Electronic Commerce Research---SPRINGER
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Submitted on: 20 November 2009.
Revised on: 06 February 2010.
Accepted on: 19 February 2010.
___________________Electronic Commerce Research---SPRINGER
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