Research into ‘world cities’ has helped rooting (urban) geography in globalization debates. The world city literature focuses on a broad range of topics, and adopts very different ontologies, epistemologies, and methodologies. In spite of this multiplicity, the literature collectively deepens and extends our understanding of how (1) specific cities function as key platforms in the organization of a globalized economy/society; and (2) how this impacts socio-spatial changes within those cities. Nonetheless, because the literature lacks a central paradigm, even the most widely cited contributions are best understood as specific building blocks within an increasingly diverse literature on cities in globalization. The chapter reviews key conceptualizations of world cities and how these have become increasingly extended and contested; the main spatiotemporal and organizational dimensions of world city-formation; discusses a mapping of world cities based on the geographies of the office networks of producer services firms; and charts major future research agendas.
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