Cal Biruk (Oberlin, Anthropology) on the politics of knowledge production in African fieldwork. We talk about her new book, Cooking Data: Culture and Politics in an African Research World, based on HIV and AIDS research in Malawi. The discussion explores the social and cultural cleaning ("cooking") of survey data and its implications for demographers and the public. Biruk then draws attention to the key role played by Malawian intermediaries, gift exchange, and ethics in the research process.