The sectorial level means those special sectors in which public services are being created, produced and delivered: health care, education. transport, social security police. The best way to approach these sectors is to include the public or governmental agencies politically responsible and bureaucratically involved in them, together with the private, non-profit and semi-public organizations and agencies involved. The research issues might come from several kinds of scholarly interests. First there are the vast bodies of literature on these areas and sectors such as health, transport. police, education, etc. This literature offers rich insights on which to draw, in particular if we are able to use them as creative sources for generating hypotheses as to particularities and generalizabilities. Then there are scholarly areas such as (new) institutionalism and (policy) networks. These have a lot to offer in terms of asking attention for structural, processual and cultural conditions under which organizations interact and policies are formulated and implemented. Not all this is new and will persist. One might expect, however, that a critical view on these approaches with combinations of more familiar and new conceptualizations will bring out new research issues, which in the context of PSM sectors can be of great importance, in particular if we see these in systemic terms of composing and decomposing diversities, dynamics and complexities at different levels of aggregation as indicated earlier: managers within organizations, organizations within policy or issue networks, networks within institutional settings or fields and fields in new interactive patterns of overall governance. Then the inherent richness of all these sectorial approaches will be used in the most fruitful way.