2006: K. Jefferis and A. Kinghorn, “Economic Impact of HIV/AIDS in Botswana: Linkages between Macroeconomic, Sector and Household Levels” presented at the Harvard School of Public Health, September
2005: K. Jefferis, “How Trade Liberalisation Can Contribute to solving the Crisis in the Beef and Cattle Sector”, presented at the Southern African Global Competitiveness Hub, Gaborone, May.