She holds a PhD in Agricultural and Resource Economics from the University of California at Berkeley and is a graduate of Smith College. Dr. Null’s research focuses on water, sanitation and hygiene in sub-Saharan African (specifically, rural western Kenya and urban Ghana). She spent several years developing and testing the Chlorine Dispenser System under IPA’s Safe Water Program in Kenya. She is also a Co-Investigator on IPA’s “WASH Benefits” study which studies the relative benefits of water, sanitation, and hygiene interventions, alone and in combination. Dr. Null is directing an additional study in Accra, Ghana called the “SaniPath” Project which will assess fecal exposure pathways using environmental microbiology and behavioral research.