Project Summary The Center for Studies in Demography & Ecology (CSDE) requests renewal of its five-year research center infrastructure award (P2C). CSDE is a community of faculty, research scientists and students associated to advance population science through research and training. CSDE scientists develop new demographic measures and methods and advance knowledge about population dynamics and population health. CSDE aims to advance the scientific understanding of human population processes, especially as they relate to five Primary Research Areas (PRA): (1) Demographic Measurements and Methods, (2) Environments and Populations, (3) Health of People and Populations, (4) Migrations and Settlements, and (5) Wellbeing of Families and Households. Throughout the next five years, CSDE proposes an overarching initiative at the scientific intersection of demography, data innovation, and population disparities, which should catalyze timely and critically needed population science research and launch early stage investigators' independent research within and across PRAs. CSDE offers an intellectual home for collaborating and learning through its weekly seminar series, workshops, program-specific activities organized by PRA Chairs, staffing support for logistics, real and virtual meeting space, and information sharing. CSDE provides the very best support for all aspects of research administration from project inception to completion. CSDE advances population science through expert consultation on every stage of science and easy access to cutting-edge facilities that place CSDE affiliate researchers' work at the very forefront of their fields, including high performance computing, a biodemography lab, data collaborative, and federal statistics data enclave. CSDE catalyzes population science through: (1) opportunities and venues for intellectual exchanges and advancing affiliates' research, (2) promotion of early career scientists' research, (3) innovative multi-investigator faculty research initiatives with potential for high-reward results significantly advancing population science, and (4) outreach to external affiliates at non-NIH-funded research centers. CSDE fosters novel approaches for advancing population science through its faculty and staff whose methodological prowess includes expertise in Biodemography, Data Science, and Demography. The UW values CSDE, providing $1,375,000 annually from the Office of Research, College of Art and Sciences, and seven other colleges, schools, and initiatives. This support totals $6.9 million over five years and represents an 83% increase from five years ago, reflecting UW's recognition of CSDE's productivity, innovation, and impact.