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Submitted on: 16 September 2021.
Revised on: 11 December 2021.
Accepted on: 30 December 2021.
___________________International Journal of Management and Economics
Submitted on: 24 February 1999.
Revised on: 29 May 1999.
Accepted on: 10 June 1999.
___________________International Journal of Management and Economics
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Submitted on: 18 December 2003.
Revised on: 18 January 2004.
Accepted on: 26 February 2004.
___________________International Journal of Management and Economics