With Chicago as the articulator, eight other US cities feature as primary ﬁeld cities, thus making up half of the cities with component scores above unity (Figure 6.4). With management consultancy being the archetypal American producer service, this geographical concentration is not surprising. However, there is a second, less predictable feature of this service ﬁeld: its primary ﬁeld cities are largely the less important cities within and without the United States. Thus New York and Los Angeles in the United States and London, Paris and Tokyo beyond are conspicuous by their absence as primary ﬁeld cities. And, in addition, no Paciﬁc Asian cities feature as primary ﬁeld cities.