This study will link data from the 2012 and 2019 waves of the National Survey of Early Care and Education (NSECE) with an innovative 50-state qualifications database constructed for this study. The research team will use these sources to answer the following questions: (1) How much do minimum ECE preservice qualifications requirements vary? (2) How do minimum preservice qualifications requirements in child care relate to those in state prekindergarten and K–12 education? (3) How do minimum preservice qualifications requirements relate to the training and experience, diversity, motivation, and compensation of the ECE workforce?