Global city

City important to the world economy

New York City (top) and London (bottom) are the only two cities ranked in the Alpha ++ category by the Globalization and World Cities Research Network. Both cities are considered leading financial, commercial and cultural centers.

A global city, also known as a power city, world city, alpha city, or world center, is a city that serves as a primary node in the global economic network. The concept originates from geography and urban studies, based on the thesis that globalization has created a hierarchy of strategic geographic locations with varying degrees of influence over finance, trade, and culture worldwide.[1] The global city represents the most complex and significant hub within the international system, characterized by links binding it to other cities that have direct, tangible effects on global socioeconomic affairs.[2]

The criteria of a global city have varied over time and depending on the source;[3] common features include a high degree of urban development, a large population, the presence of major multinational companies, a significant and globalized financial sector, well-developed and internationally linked transportation infrastructure, local or national economic dominance, high quality educational and research institutions, and a globally influential output of ideas, innovations, or cultural products. Quintessential examples, based on most indices and research, include New York City, London, Paris, and Tokyo.

Origin and terminology

The term global city was popularized by sociologist Saskia Sassen in her 1991 book, The Global City: New York, London, Tokyo.[4] Before then, other terms were used for urban centers with roughly the same features. The term world city, meaning a city heavily involved in global trade, appeared in a May 1886 description of Liverpool, by The Illustrated London News;[5] British sociologist and geographer Patrick Geddes used the term in 1915.[6] The term megacity entered common use in the late 19th or early 20th century, the earliest known example being a publication by the University of Texas in 1904.[7] In the 21st century, the terms are usually focused on a city's financial power and high technology infrastructure.[8][9]

Criteria

Manhattan, the core area of New York City, an Alpha++ global city, where there are several characteristic elements of global cities[10] like worldwide influential economic (New York Stock Exchange) and cultural (Broadway) centers, headquarters of international political organizations (UN headquarters), world renowned museums (the Met Museum, MOMA, Guggenheim Museum), and worldwide-known landmarks (Times Square, Empire State Building, Central Park)

Competing groups have devised competing means to classify and rank world cities and to distinguish them from non-world cities.[6] Although there is a consensus on the leading world cities,[11] the chosen criteria affect which other cities are included.[6] Selection criteria may be based on a yardstick value (e.g., if the producer-service sector is the largest sector then city X is a world city)[6] or on an imminent determination (if the producer-service sector of city X is greater than the combined producer-service sectors of N other cities then city X is a world city.)[6] Cities' rankings can fall, as in the case of cities that have become less cosmopolitan and less internationally renowned.

Characteristics

Although criteria are variable and fluid, these are typical characteristics of world cities:[12]

Rankings

Global city rankings are numerous, with one study suggesting as many as 300 global cities worldwide.[15] New York City, London, Tokyo, and Paris are notably the most prominent metropolises mentioned in this respect.[16][17] They have been ranked in the top four positions in the Global Cities Index and Global Power City Index since both indices' inception in 2008, with New York and London rotating for the first position over the last ten years exclusively in the top two spots.

GaWC study

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