“Which Cases Do I Need?” Constructing Cases and Observations in Qualitative Research

This methodological review starts one step before Small's classic account of how many cases a scholar needs. We ask, “Which cases do I need?” We argue that a core feature of most qualitative research is case construction, which we define as the delineation of a social category of inquiry. We outline how qualitative researchers construct cases and observations and discuss how these choices impact data collection, analysis, and argumentation. In particular, we examine how case construction and the subsequent logic of crafting observations within cases have consequences for conceptual generalizability, as distinct from empirical generalizability. Drawing from the practice of qualitative work, we outline seven questions qualitative researchers often answer to construct cases and observations. Better understanding and articulating the logic of constructing cases and observations is useful for both qualitative scholars embarking on research and those who read and evaluate their work.