1. Respectively lecturer and graduate student, Department of Accounting and Finance, University of Natal, King George V Avenue, Durban 4001, Republic of South Africa. Thanks to Prof Jean Miller and Mr Adrian Saville for their proofreading of a preliminary draft. The constructive comments of an anonymous referee are appreciated. The financial assistance of the Centre for Science Development, (HSRC, South Africa) towards this research is hereby acknowledged. Opinions expressed and conclusions arrived at, are...