“…In making the case for this complementary 'triangle of rules', I have pointed at potential middle-range theories, transferable insights and lines of inquiry, which may animate comparative analyses of health system governance and also inform efforts to strengthen it. [57][58][59] What I have tried to do in this editorial essay, as Ronald Coase once said, 'has been to urge the inclusion in our analysis, of features of the (health) system so obvious that… they have tended to be overlooked'. 60 The language of rules (or institutions) and their configurations (or arrangements), the middle-range theories they suggest, and the analytical stance they require, may yet improve our analysis of health system governance.…”