The Center for Knowledge Infrastructures is located in the UCLA Department of Information Studies and directed by Christine L. Borgman, Distinguished Professor and Presidential Chair in Information Studies. We conduct research on scientific data practices and policy, scholarly communication, and socio-technical systems. We also mentor students, post-doctoral fellows, and visiting scholars in these areas. Our largest current project, titled If Data Sharing is the Answer, What is the Question?, is funded by the Digital Information Technology Program of the Alfred P. Sloan Foundation #2015‐14001. This three-year project is studying data practices, policy, and infrastructure of four distributed scientific collaborations, exploring methods of data collection and management, innovations in scaling and workflows, and multidisciplinary approaches to complex problems. We continue to publish findings from our previous three-year Sloan Foundation project #2011-3194, The Transformation of Knowledge, Culture, and Practice in Data-Driven Science: A Knowledge Infrastructures Perspective. Also in progress is a study of the uses and users of digital data archives, conducted in cooperation with DANS, the Digital Archiving and Networked Services program in the Netherlands. Research in the Center also has been funded by grants from the National Science Foundation and gifts from Microsoft Research.