Bachelor with Honours, University East Anglia, Norwich, 1978. Master of Arts, University East Anglia, Norwich, 1980. Doctor of Philosophy in Economic, University Natal, Durban, South Africa, 2003.
Fellow Overseas Development Institute, London, 1980—1983. Research fellow University Natal, Durban, 1983—1997. Director University KwaZulu-Natal Health Economics Human Immunodeficiency Virus-Acquired Immune Deficiency Syndrome Research Division, since 1998, professor, since 2001.
Leverhulme visiting professor University Southampton, England, 2004—2006. Commissioner United Nations Commission Human Immunodeficiency Virus-Acquired Immune Deficiency Syndrome Governance Africa, Addis Ababa, Ethiopia, 2004—2006. International advisory editorial board Development Policy Review, United Kingdom, since 2004.
Visiting professor Liverpool School Tropical Medicine, England, since 2008.
Patron Themba Human Immunodeficiency Virus/Acquired Immune Deficiency Syndrome Organization, Johannesburg, 2003. Member governing council International Acquired Immune Deficiency Syndrome Society, Geneva, 2000. Governor Waterford Kamhlaba United World College, Mbabane, Swaziland, 1994.
Trustee Waterford Charitable Trust, London, 1996. Member of African Journal Acquired Immune Deficiency Syndrome Research (member editorial board since 2002), Commonwealth Society.
Life partner Ailsa Marcham. Children: Douglas Alan, Rowan Dilys Tolfree.