Hannah Chirgwin is a development economist and research associate working with the International Initiative for Impact Evaluation (3ie). She is part of the synthesis and review team and supports the production of systematic reviews and evidence gap maps. Before joining 3ie, Hannah worked on the monitoring and evaluation of programmes, including Women Empowered and PAISANO (food security), for Project Concern International (PCI) in Guatemala. She also has experience working as a research assistant for Professor Dutta in Canada and with the Malaria consortium in Nigeria. Hannah's research interests include health and behavioural economics, as well as how to maximise the impact, and use, of evidence. Hannah has an MSc in Economics from University College London and a BSc in Chemistry from McGill University.