1. This paper draws heavily on a paper presented to a trade training course of the British Department for International Development (DFID) in March 2002. The paper is based on a number of studies conducted by the author. The research has been condensed to provide an overview of this sector of trade. Details can be found in: Peberdy, 1999; 2000a; 2000b; 2000c; Peberdy & Rogerson, 2000; Peberdy & Crush, 1998, 2001. When the paper refers to research for this paper it is referring to these studies. The research was kindly funded by the Canadian International Development Agency and the International Development Research Centre.