The Western Interstate Commission for Higher Education (WICHE) has been conducting the Multistate Longitudinal Data Exchange (MLDE) expansion project with funding from the Bill & Melinda Gates Foundation. The project has the goal of linking data from K–12, higher education, and labor sources between U.S. states via a secure and stable exchange process. The MLDE is designed to address the cumulative and geographically mobile nature of human capital and to provide practitioners, policymakers, and researchers with a richer, more complete data source for improving education and labor market outcomes. EERC has been conducting an evaluation of the implementation of the MLDE, providing annual reports that examine and assess the project as it evolves. The evaluation has focused on numerous issues including potential users’ view of participating with the MLDE and its value; the communication needs of potential partners, the development of data-use plans, level of commitment to the MLDE across states, and the experience of the states involved in the pre-test state data exchange.