This conference, financed by the Rockefeller Foundation, was attended by the research directors of the following centres: Institut de recherches économiques et sociales (I.R.E.S.), Lovanium University, Congo; Nigerian Institute of Social and Economic Research (N.I.S.E.R.), University of Ibadan; U.N. African Institute for Economic Development and Planning (I.D.E.P.), Dakar, Senegal; Economic Development Institute (E.D.I.), University of Nigeria, Nsukka; Institut de rcience économique appliquée (I.S.E.A.), Dakar; Department of Economics, University of Khartoum, Sudan; proposed Bureau of Economic Research, the University College, Dar es Salaam, Tanzania; East African Institute of Social Research (E.A.I.S.R.), Makerere University College, Uganda; and the Rhodes-Livingstone Institute, Lusaka, Zambia. In addition, there were the director of the Economic Development Division of the U.N. Economic Commission for Africa (E.C.A.), Addis Ababa; the head of the Training Division of the O.E.C.D. Development Centre, Paris; a member of the Institute of Economic Research of the National University of Chile, Santiago; and two representatives of the Rockefeller Foundation, New York.