In recent years an extensive range of new research has been revisiting the topic of the location of international business activities, from a variety of different perspectives and background interests. This work has been inspired in part by two apparently quite different but actually related contemporary trends: on the one hand, an emergence or revitalization of clusters of activities co-located in or around selected global city regions or fast growing metropolitan areas; and on the other hand, an increased global dispersion of activities conducted within the value chains managed or...