Case studies form an important part of qualitative social science and are undertaken in diverse ways to meet different goals. Relatively numerous but shallow cases are used as ‘apt illustrations’ at one end of the spectrum. At the other end, one or a few ‘deep’ cases in ‘diagnostic’ mode often seek to show the holistic and necessary nature of causal connections in a given situation. There are also many intermediate forms of case, and strong connections now to mixed methods and qualitative comparative analysis (QCA) and set-defined cases. Open social science aims to enhance the ease of reproducing and replicating all forms of case study evidence, and to strengthen the robustness and generalizability of studies using this key methods tool. P...