Dr Marco J Haenssgen is a social scientist with a background in management and international development and experience in aid evaluation, intergovernmental policy making, and management consulting. His research relates to interactions between patients and the health system, healthcare-seeking behaviour, social and technological change, and evaluation. He conducts mixed-methods research with a regional focus on Southeast Asia. Current research activities include a social study of C-reactive protein biomarker testing in Thailand, Myanmar, and Vietnam; qualitative research on evolving antibiotic use in rural Thailand; and surveys of rural healthcare-seeking behaviour in the context of antibiotic use in rural Thailand and Laos.