At CDO, scientific researchers from different disciplines (political scientists, economists, educational scientists, (bio)engineers,sociologists, environmentalists, physicists, urban planners, etc.) work together to conduct sustainability research. Taking sustainability in its multiple dimensions (economic, social,physical-ecological, institutional and ethical) as a guiding – though not determining – perspective, interdisciplinarity and transdisciplinarity are key aspects of research conducted at CDO, where interdisciplinarity is broadly understood as a kind of cooperation between scientific disciplines, and transdisciplinarity is understood as a kind of interrelationship between science and society. The identity of the CDO research team also lies in its adherence to a nuanced constructivist epistemological stance, which is reflected in the use ofa critical policy analysis framework, a participative research approach and, last but not least, the framing of sustainability issues as‘political’ issues.