The Water and Sanitation Program (WSP) with support from the Gates Foundation and in close partnership with the Ministry of Health has implemented a hygiene project called “Scaling Up Hand-washing Behavior Change” in Vietnam. A central goal of this project was to document the institutional requirements, the magnitude of health, welfare and development impacts, and costs of these campaigns.  To these ends, the Government of Vietnam and WSP support an impact evaluation (IE) of the intervention using rigorous research methodologies including a randomized impact evaluation design and the collection of multiple measures based upon household and community questionnaires and intensive surveys