He has conducted field research in Kenya, the Gambia, and Colombia. He has held visiting appointments at Yale, the Universities of Virginia, Nairobi, Padova (Padua), and at Waseda University (Tokyo). His publications include Bitter Money: Cultural Economy and Some African Meanings of Forbidden Commodities; co-edited publications including Seeking Solutions: Framework and Cases for Small Enterprise Development Programs and Rights over Land: Categories and Controversies. For Blackwell Publishers, he is the Series Editor of the Peoples of Africa series, and of the Blackwell Anthologies in Social and Cultural Anthropology. Current interests include symbolic and economic anthropology, and the history of the social sciences and philosophy, particularly concerning Africa and first peoples of America. He is a former president of the Association for Africanist Anthropology, a section of the American Anthropological Association.
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