The seminar will focus on Mapping out the landscape of research methods in public health ranging from experimental/quasi-experimental methods to various other social science research methods and participatory methods in relation to their disciplinary underpinnings, epistemology and ontology. In a second part of the session, there will be a discussion on the typology of research questions in public health, especially within health policy and systems research, focusing on what kind of research approaches suit specific questions and why.