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Submitted on: 27 July 1998.
Revised on: 15 October 1998.
Accepted on: 22 November 1998.
___________________Journal of African Business---ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
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Submitted on: 06 August 2006.
Revised on: 10 September 2006.
Accepted on: 24 September 2006.
___________________Journal of African Business---ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD