Of the many economists who have worked for the United Nations, Hans W. Singer was the one who did more, and for more different parts of the Organization, than any other.1 During his 22-year career with the United Nations, he worked for the Economic Affairs Department (now DESA), helped lay the foundations for the United Nations Development Programme (UNDP) through his work on the UN Special Fund and the Expanded Programme of Technical Assistance (EPTA), undertook assignments for the UN Children’s Fund (UNICEF), provided the intellectual rationale for the World Food Programme (WFP) and also spent time with the Economic Commission for Africa (ECA), the African Development Bank (ADB), the UN Conference on Trade and Development (UNCTAD), the UN Research Institute for Social Development (UNRISD) and the UN Industrial Development Organization (UNIDO).