http://reply.papertrans.cn/3/284/28392/28392-31.png
Submitted on: 27 December 2001.
Revised on: 26 January 2002.
Accepted on: 01 February 2002.
South African Journal of Economic and Management Sciences
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http://reply.papertrans.cn/3/284/28392/28392-34.png
Submitted on: 20 January 2022.
Revised on: 12 February 2022.
Accepted on: 23 February 2022.
South African Journal of Economic and Management Sciences
http://reply.papertrans.cn/3/284/28392/28392-36.png