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I am an archaeologist with active research in Africa and a particular interest in medium-range and large-scale societies over the last two millennia. My earliest research was in West Africa where I conducted an ethnoarchaeological study of craft production in Jenne, Mali with implications for early urbanism in the Inland Niger Delta. Since 1987 I have been working on the East African coast, conducting survey and excavation in several regions on the mainland and on Pemba Island, Tanzania, on sites at the intersection of archaeology, ethnology, and history. At the Swahili centers of Pujini, Chwaka, and Tumbe, and at smaller village sites, I am exploring such topics as household organization, political economy, the changing practice of Islam and its effects on social and cultural life, the interface of regional domestic economy with long-distance Indian Ocean trade networks, and the transformations in social structure within the contexts of urbanism and colonialism. I have made a research priority the integration of village-dwelling and non-elite coastal peoples into Swahili historiography. I maintain long-term collaborative relationships with colleagues in Africa, the US, and Europe. With Neil Norman, I am developing a project in the Zanzibar countryside concerning the effects of Portuguese colonialism. I am also the Editor-in-Chief of the African Archaeological Review, a premier journal of our discipline with wide-ranging theoretical, topical, and geographic coverage of the continent and beyond.