Global Metropolitan-Regional Scale in Evolution: Metropolitan Intermediary Cities and Metropolitan Cities

The case of Madrid is used as empirical focus to propose a new classification of the metropolitan region urban medium-sized or secondary city system. Based on a methodology that integrates the morphological (size, location and socioeconomic history) and the functional dimensions (centrality index, advanced producer services (APS) concentration and commuting), the article compares new employment centres—cities with metropolitan origin—and historical cities—previously free standing cities, progressively integrated in metropolitan processes. The results show a distinction between (1) metropolitan cities, with a traditional intermediation role, and (2) metropolitan intermediary cities, that include an additional quality to their traditional intermediation role, that of concentrating APS. The article confirms that some medium-sized cities—metropolitan intermediary cities—linked to different origins and up to 100?km away from the metropolis are more visible in the global scene and are establishing an emerging global multicore-network at a metropolitan-regional scale.