http://reply.papertrans.cn/3/284/28393/28393-11.png
Submitted on: 05 November 2019.
Revised on: 06 December 2019.
Accepted on: 22 December 2019.
SOUTH AFRICAN JOURNAL OF ECONOMICS
Submitted on: 12 August 2010.
Revised on: 25 August 2010.
Accepted on: 03 September 2010.
SOUTH AFRICAN JOURNAL OF ECONOMICS
http://reply.papertrans.cn/3/284/28393/28393-14.png
http://reply.papertrans.cn/3/284/28393/28393-15.png
Submitted on: 07 April 2022.
Revised on: 14 May 2022.
Accepted on: 20 May 2022.
SOUTH AFRICAN JOURNAL OF ECONOMICS
http://reply.papertrans.cn/3/284/28393/28393-17.png
http://reply.papertrans.cn/3/284/28393/28393-18.png
http://reply.papertrans.cn/3/284/28393/28393-19.png
http://reply.papertrans.cn/3/284/28393/28393-20.png