Recent historiography has revealed a growing interest in the developments of psychiatric epidemiology. This volume aims to explicitly tackle the problem of transforming a diversity of knowledge into a structured scientific unit. Furthermore, it aims to answer this by bringing together historical studies that demonstrate how epistemic authority has led to the hierarchization of knowledge and the institutionalization of psychiatric epidemiology. Interdisciplinary research teams are traced back in history, and their organization is interrogated. Tracing the history of psychiatric epidemiology involves an exploration of disciplinary divisions of labour, such as how survey methods are based on theoretical frameworks, how research programmes are regulated with political and moral ideals, and how the wider public recognizes public health expertise.