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- Agricultural Economist, KwaZulu Department of Agriculture and Forestry.
- Lecturer, Department of Agricultural Economics, University of Natal. The authors gratefully acknowledge financial assistance from the Agricultural Policy Research Unit (sponsored by the HSRC) and support from the KwaZulu Department of Agriculture and Forestry which provided staff and equipment for the survey. Thanks are also conveyed to an anonymous referee and Dr G Ortmann for valuable comments on an earlier draft.