This article re-conceptualizes sampling in social research. It is argued that three inter-related a priori assumptions limit on the possibility of sample design,namely: (a) the ontology of the case, (b) the epistemological assumptions underpinning what properties are necessary to know the case and (c) the logistics involved in the process of ‘casing’ the case. In considering sampling in this way, not only are key criteria commonly used to gauge the validity of sample problematized, but a genuine epistemological bridge between probability and non-probability sample designs is also forged.

Click here to read further more.