SCIENTIFIC AND TECHNICAL CORE PROJECT SUMMARY The Scientific and Technical Core (ST) will invest in data and statistical expertise and computing infrastructure to stimulate, advance, and support innovative, high-impact, interdisciplinary research on key questions in population dynamics. The ST Core will enhance the research productivity and capabilities for CCPR affiliates, and it will also provide enhanced support for junior population researchers who receive priority for services. The ST Core has the following four specific aims: 1) Provide expertise and training in the choice, development, and implementation of computational and statistical methods; 2) Expand research and data infrastructure in large data storage and computation for population research; 3) Offer research-centered workshops and institutes that feature state-of-the-art statistical and computational methodology for advancing population research; and 4) Facilitate dissemination of data and research findings to external audiences. Demand for data and computing services at CCPR has increased rapidly in the number of projects served and projects' methodological and data and computing demands. The ST Core will seamlessly integrate across the Cores, keeping population research in the foreground while investing in technical expertise and infrastructure to research critical questions population dynamics. The Core also provides activities and services to scientists at under-resourced institutions.