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Submitted on: 14 February 2014.
Revised on: 10 March 2014.
Accepted on: 11 April 2014.
___________________African Journal of Economic and Management Studies
Submitted on: 18 April 2010.
Revised on: 20 July 2010.
Accepted on: 05 August 2010.
___________________African Journal of Economic and Management Studies
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Submitted on: 24 May 2009.
Revised on: 18 June 2009.
Accepted on: 10 July 2009.
___________________African Journal of Economic and Management Studies
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