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Submitted on: 26 June 2005.
Revised on: 11 October 2005.
Accepted on: 28 October 2005.
___________________International Journal of Islamic and Middle Eastern Finance and Management
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Submitted on: 27 January 2013.
Revised on: 09 April 2013.
Accepted on: 19 May 2013.
___________________International Journal of Islamic and Middle Eastern Finance and Management