The World Bank recently hosted a symposium on the priority of early child development (ECD) for economic growth and equity. The participants urged application of population-based tools and measures to assess the outcomes of children's early years and children's readiness for school. This study is derived from the symposium and is a valuable resource for policy makers, economists, donors, and investors, as well as researchers and practitioners in early child development. It summarizes the current neuroscience on early child development and major longitudinal studies, the rationale and urgency for greater investment, and countries' innovative funding strategies. The report consists of 15 chapters authored by ECD experts and leaders in the field. The chapters are grouped into five main parts relating to the: business imperative and societal benefits of ECD investments
lessons from evaluation of longitudinal ECD interventions
countries' experiences in monitoring ECD interventions
innovative approaches to countries' financing of ECD initiatives
and next steps on the ECD agenda for the next 5 years. A theme highlighted at the symposium and enlarged upon here is the urgent need for evidence- and population-based instruments and measures to monitor, evaluate, and compare ECD interventions over time and across settings.