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A global city (also called world city or sometimes alpha city or world center) is a city generally considered to be an important node in the global economic system. The concept comes from geography and urban studies and rests on the idea that globalization can be understood as largely created, facilitated, and enacted in strategic geographic locales according to a hierarchy of importance to the operation of the global system of finance and trade.

The most complex of these entities is the global city, whereby the linkages binding a city have a direct and tangible effect on global affairs through socio-economic means. The use of global city, as opposed to megacity, was popularized by sociologist Saskia Sassen in her 1991 work, The Global City: New York, London, Tokyo though the term world city to describe cities that control a disproportionate amount of global business dates to at least the May 1886 description of Liverpool by the Illustrated London News. Patrick Geddes also used the term world city later in 1915. Cities can fall from such categorization, as in the case of cities that have become less cosmopolitan and less internationally renowned in the current era, e.g., Alexandria, Egypt; Coimbra, Portugal; and Thessaloniki, Greece.

Criteria

Global city status is considered to be beneficial and desired, and because of this many groups have tried to classify and rank which cities are seen as world cities or non-world cities. Although there is a consensus upon leading world cities, the criteria upon which a classification is made can affect which other cities are included. The criteria for identification tend either to be based on a yardstick value (e.g., if the producer-service sector is the largest sector then city X is a world city) 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.)

Economic characteristics

• Serve as the corporate headquarter sites for multinational corporations, international financial institutions, law firms, conglomerates, and stock exchanges that influence the world economy
• Contribute significant financial capacity/output to the city's, region's, or even nation's GDP
• House the major stock market indices/market capitalisation
• Provide a variety of international financial services, notably in the FIRE industries, banking, accountancy, and marketing
• Appear near the top of cost of living lists and have significant agglomerations of personal wealth, e.g. in the number of billionaires residing within the city

Political characteristics

• Active influence on and participation in international events and world affairs; for example, Beijing, Berlin, London, Moscow, New Delhi, Paris, Tokyo, and Washington are capitals of influential nations.
• Hosting headquarters for international organizations such as the World Bank, NATO, or the UN.
• A large proper, population of the municipality (the centre of a metropolitan area, typically several million) or agglomeration
• Diverse demographic constituencies based on various indicators: population, habitat, mobility, and urbanisation
• Quality of life standards or city development
• Expatriate communities

Cultural characteristics

• International, first-name familiarity. Cities such as New York City, Los Angeles, San Francisco, Tokyo, Mumbai, Paris, Berlin and London are commonly referred to without needing to specify their country.
• Renowned cultural institutions (often with high endowments), such as notable museums and galleries, notable opera, major ballet companies, orchestras, notable film centres and theatre centres. A lively cultural scene, including film festivals (such as the Toronto International Film Festival), premieres, a thriving music scene, nightlife, an opera company, art galleries, street performers, and annual parades.
• Several influential media outlets with an international reach, such as the BBC, Thompson Reuters, The New York Times, or Agence France-Presse.
• A strong sporting community, including major sports facilities, home teams in major league sports, and the ability and historical experience to host international sporting events such as the Olympic Games, FIFA World Cup, or Grand Slam tennis events.
• Educational institutions; e.g., renowned universities, international student attendance, research facilities
• Sites of pilgrimage for world religions (for example, Mecca, Jerusalem or Rome)
• Cities containing World Heritage Sites of historical and cultural significance
• Tourism throughout
• City as site or subject in arts and media, television, film, video games, music, literature, magazines, articles, documentary
• City as an often repeated historic reference, showcase, or symbolic actions

Infrastructural characteristics

• An advanced transportation system that includes several highways and/or a large mass transit network offering multiple modes of transportation (rapid transit, light rail, regional rail, ferry, or bus), for example, the London Underground or the Tokyo Metro.
• Extensive and popular mass transit systems, prominent rail usage, road vehicle usage, major seaports
• A major international airport that serves as an established hub for several international airlines, for example, London Heathrow, Los Angeles International, Atlanta, Tokyo, and Chicago O'Hare. Airports with significant passenger traffic and international passengers traffic or cargo movements.
• An advanced communications infrastructure on which modern trans-national corporations rely, such as fiberoptics, Wi-Fi networks, cellular phone services, and other high-speed lines of communications. For example, Seoul and Tokyo are known as the digital and technology capitals of the world.
• Health facilities; e.g., hospitals, medical laboratories
• Prominent skylines/skyscrapers (for example Chicago, Hong Kong, New York, Sao Paulo or Tokyo)
• Cities' telephone and mail services, airport flights-range, traffic congestion, availability of water, train facilities, nearby parks, hospitals, libraries, police stations, etc.

Studies

GaWC studies

The first attempt to define, categorize, and rank global cities using 'relational data' was made in 1998 by Jon Beaverstock, Richard G Smith and Peter J. Taylor, who all worked at that time at Loughborough University in the United Kingdom, and further by academic researchers like Ronald Daus in Germany (Free University of Berlin), who focused on «extra-European cities, predominantly in the Southern hemisphere». Together, Beaverstock, Smith and Taylor established the Globalization and World Cities Research Network. A roster of world cities was outlined in the GaWC Research Bulletin 5 and ranked cities based on their connectivity through four "advanced producer services": accountancy, advertising, banking/finance, and law. The GaWC inventory identifies three levels of global cities and several sub-ranks.

The 2004 rankings acknowledged several new indicators while continuing to rank city economics more heavily than political or cultural factors. The 2008 roster, similar to the 1998 version, is sorted into categories of "Alpha" world cities (with four sub-categories), "Beta" world cities (three sub-categories), "Gamma" world cities (three sub-categories), and additional cities with "High sufficiency" or "Sufficiency" world city presence.

The 2010 roster of leading Alpha, Beta and Gamma world cities is as follows:

Global Cities Index

In 2008, the American journal Foreign Policy, in conjunction with consulting firm A.T. Kearney and the Chicago Council on Global Affairs, published a ranking of global cities, based on consultation with Saskia Sassen, Witold Rybczynski, and others. Foreign Policy noted that "the world’s biggest, most interconnected cities help set global agendas, weather transnational dangers, and serve as the hubs of global integration. They are the engines of growth for their countries and the gateways to the resources of their regions."

In 2012 the index was updated.

#1 New York#2 London
#3 Paris#4 Tokyo#5 Hong Kong#6 Los Angeles#7 Chicago#8 Seoul#9 Brussels
#10 Washington, D.C.class=notpageimage| Top ten global cities

Rank	Change	City	Rating
1		New York City	6.35
2		London	5.79
3	1	Paris	5.48
4	1	Tokyo	4.99
5		Hong Kong	4.56
6	1	Los Angeles	3.94
7	1	Chicago	3.66
8	2	Seoul	3.41
9	2	Brussels	3.33
10	3	Washington, D.C.	3.22
11	3	Singapore	3.20
12	3	Sydney	3.13
13	5	Vienna	3.11
14	1	Beijing	3.05
15	4	Boston	2.94
16	2	Toronto	2.92
17	5	San Francisco	2.89
18	1	Madrid	2.80
19	6	Moscow	2.77
20	4	Berlin	2.76
21		Shanghai	2.73
22		Buenos Aires	2.71
23	3	Frankfurt	2.69
24	2	Barcelona	2.59
25	1	Zurich	2.53

Rank	Change	City	Rating
26	3	Amsterdam	2.45
27	4	Stockholm	2.43
28		Rome	2.36
29	2	Dubai	2.32
30	1	Montreal	2.32
31	2	Munich	2.31
32	NA	Melbourne	2.25
33	2	São Paulo	2.19
34	4	Mexico City	2.18
35	3	Geneva	2.13
36	2	Miami	2.13
37	4	Istanbul	2.10
38		Houston	2.08
39	1	Atlanta	2.06
40	1	Taipei	2.05
41	1	Milan	2.01
42	5	Copenhagen	1.99
43	7	Bangkok	1.93
44		Dublin	1.82
45	1	Mumbai	1.79
46	4	Tel Aviv	1.69
47		Osaka	1.57
48	3	New Delhi	1.55
49	1	Kuala Lumpur	1.49
50	7	Cairo	1.49

Rank	Change	City	Rating
51		Manila	1.49
52		Johannesburg	1.48
53	4	Rio de Janeiro	1.31
54	1	Jakarta	1.30
55	1	Bogota	1.17
56		Nairobi	0.98
57	2	Caracas	0.89
58		Bangalore	0.85
59		Lagos	0.84
60	3	Guangzhou	0.82
61		Ho Chi Minh City	0.72
62	2	Karachi	0.66
63	1	Dhaka	0.65
64	1	Kolkata	0.63
65	3	Shenzhen	0.62
66	1	Chongqing	0.25

Global City Competitiveness Index

In 2012, Economist Intelligence Unit ranked the competitiveness of global cities according to their demonstrated ability to attract capital, businesses, talent and visitors.

Rank	City	Score
1	New York City	71.4
2	London	70.4
3	Singapore	70.0
4	Hong Kong	69.3
4	Paris	69.3
6	Tokyo	68.0
7	Zurich	66.8
8	Washington, D.C.	66.1
9	Chicago	65.9
10	Boston	64.5
11	Frankfurt	64.1
12	Toronto	63.9
13	Geneva	63.3
13	San Francisco	63.3
15	Sydney	63.1
16	Melbourne	62.7
17	Amsterdam	62.4
18	Vancouver	61.8
19	Los Angeles	61.5
20	Seoul	60.5
20	Stockholm	60.5
22	Montreal	60.3
23	Copenhagen	59.9
23	Houston	59.9
25	Dallas	59.8
25	Vienna	59.8
27	Dublin	59.5
28	Madrid	59.4
29	Seattle	59.3
30	Philadelphia	58.5
31	Atlanta	58.2
31	Berlin	58.2
33	Oslo	57.2
34	Brussels	57.1
35	Hamburg	56.8
36	Auckland	56.7
37	Birmingham	56.6
37	Taipei	56.6
39	Beijing	56.0
40	Dubai	55.9

Rank	City	Score
41	Abu Dhabi	55.8
41	Barcelona	55.8
43	Miami	55.2
43	Shanghai	55.2
45	Kuala Lumpur	55.0
46	Prague	53.7
47	Doha	52.9
47	Milan	52.9
47	Osaka	52.9
50	Nagoya	52.3
50	Rome	52.3
52	Shenzhen	51.7
53	Warsaw	51.3
54	Monaco	51.0
55	Budapest	50.4
56	Incheon	50.2
57	Lisbon	49.5
58	Moscow	49.4
59	Tel Aviv	49.3
60	Buenos Aires	49.2
61	Bangkok	49.0
62	São Paulo	48.3
63	Fukuoka	47.7
64	Busan	47.4
64	Guangzhou	47.4
66	Kraków	47.3
67	Johannesburg	47.1
68	Delhi	46.7
68	Santiago	46.7
70	Mumbai	46.6
71	Mexico City	46.2
72	Athens	46.1
73	Cape Town	45.9
74	Istanbul	45.5
75	Tianjin	45.4
76	Bucharest	44.9
76	Rio de Janeiro	44.9
78	Panama City	44.8
79	Bangalore	44.6
80	Kuwait City	44.2

Rank	City	Score
81	Jakarta	44.1
82	Dalian	44.0
83	Chengdu	43.5
84	Suzhou	43.4
85	Manila	43.2
86	Muscat	43.0
87	Chongqing	42.9
88	Lima	42.5
89	Bogotá	42.3
90	Monterrey	42.2
91	Qingdao	42.1
92	Ahmedabad	41.9
93	Hangzhou	41.6
94	Durban	41.2
95	Ankara	40.9
96	Medellín	40.0
97	Pune	39.8
98	Belo Horizonte	39.4
98	Hyderabad	39.4
100	Almaty	39.3
100	Saint Petersburg	39.3
102	Guadalajara	39.0
102	Porto Alegre	39.0
104	Hanoi	38.8
105	Chennai	38.1
106	Kolkata	37.8
106	Riyadh	37.8
108	Kiev	36.9
109	Ho Chi Minh City	36.5
110	Surabaya	35.9
111	Colombo	35.6
112	Karachi	35.5
113	Cairo	35.0
114	Bandung	34.8
115	Nairobi	34.6
116	Alexandria	31.8
117	Beirut	30.6
118	Dhaka	27.7
119	Lagos	27.6
120	Tehran	27.2

Global Power City Index

The Institute for Urban Strategies at The Mori Memorial Foundation in Tokyo, Japan issued a comprehensive study of global cities in 2011. The ranking is based on six overall categories, "Economy", "Research & Development", "Cultural Interaction", "Livability", "Environment", and "Accessibility", with 69 individual indicators among them. This Japanese ranking also breaks down top ten world cities ranked in subjective categories such as "manager, researcher, artist, visitor and resident."

Rank	City	Score	Best category (position)
1	New York City	320.9	Research & Development (1.)
2	London	320.6	Cultural Interaction (1.)
3	Paris	308.7	Accessibility (1.) Livability (1.)
4	Tokyo	304.3	Economy (1.)
5	Singapore	255.3	Cultural Interaction (4.)
6	Berlin	234.8	Environment (4.)
7	Seoul	233.4	Research & Development (5.)
8	Hong Kong	231.1	Economy (6.) Cultural Interaction (6.)
9	Amsterdam	226.6	Accessibility (5.)
10	Frankfurt	225.1	Environment (3.)
11	Sydney	215.8	Cultural Interaction (11.)
12	Vienna	215.3	Environment (5.)
13	Los Angeles	212.2	Research & Development (6.)
14	Zurich	211.4	Environment (2.)
15	Osaka	205.8	Livability (3.)
16	Boston	205.7	Research & Development (3.)
17	Geneva	205.2	Environment (1.)
18	Beijing	204.2	Economy (3.)
19	Copenhagen	203.2	Environment (10.)
20	Madrid	202.8	Livability (8.)
21	San Francisco	201.5	Research & Development (10.)
22	Vancouver	201.3	Livability (2.)
23	Shanghai	199.3	Economy (8.)
24	Brussels	199.2	Accessibility (13.)
25	Toronto	194.6	Research & Development (15.)

World City Survey

In 2010 the London based estate agent Knight Frank LLP together with the Citibank published a survey of world cities. The Wealth Report 2010, which includes the World City Survey, assesses four parameters — economic activity, political power, knowledge and influence, and quality of life. The list aimed to rank the world's 40 most influential cities. New York tops the list in Economic activity, political power and knowledge and Paris tops it in quality of life. London and Paris get the same aggregate ranking of 149, making them de facto world's 2nd and 3rd most prominent cities. In 2011, the list was updated, and the top 20 cities ranked are:

Rank	City	Best category
1	New York City	Economic activity
2	London	Economic activity
2	Paris	Quality of life
4	Tokyo	Economic activity
5	Brussels	Political power
6	Los Angeles	Knowledge and influence
7	Singapore	Economic activity
8	Beijing	Political power
9	Toronto	Quality of life
10	Berlin	Quality of life
11	Chicago	Knowledge and influence
12	Washington, D.C.	Political power
13	Seoul	Economic activity
14	Frankfurt	Quality of life
15	Sydney	Knowledge and influence
16	San Francisco	Knowledge and influence
17	Hong Kong	Economic activity
18	Shanghai	Economic activity
19	Mexico City	Political power
20	Bangkok	Political power

Company location survey

Cities ranked by category

See also

• Metropolis
• Megalopolis (city type)
• List of cities by GDP
• Primate city
• Financial centre
• Ecumenopolis
• Ranally city rating system
• Index of urban studies articles

References

1. Sassen, Saskia - The global city: strategic site/new frontier
2. Sassen, Saskia - The Global City: New York, London, Tokyo. (1991) - Princeton University Press. ISBN 0-691-07063-6
3. "UK History". History.ac.uk. 18 December 2009. Retrieved 9 May 2012.
4. ^ Doel, M. & Hubbard, P., (2002), "Taking World Cities Literally: Marketing the City in a Global Space of flows", City, vol. 6, no. 3, pp. 351-368. Subscription required
5. ^ GaWC Research Bulletin 5, GaWC, Loughborough University, 28 July 1999
6. Template:PDFlink, "World Resources 1998-99", WRI, 1998.
7. Global Urban Indicators Database 2 (1998 data) (data sets in .ZIP), UN-HABITAT
8. World Indices, Bloomberg
9. J.V. Beaverstock, World City Networks 'From Below', GaWC, Loughborough University, 29 September 2010
10. ^ Worldwide Cost of Living survey 2011 - City rankings, Mercer, 12 July 2011
11. ^ Moscow Leads Cities With Most Billionaires, Forbes, 17 May 2011
12. Template:PDFlink, "2004 Human Development Report" (page 99), UNDP, 2004
13. Template:PDFlink, "World Resources 1998-99", WRI, 1998
14. City Profiles, UN
15. Template:PDFlink, WBCSD
16. Template:PDFlink, UN, 2004
17. World-wide quality of living survey, Mercer, 10 April 2006
18. Template:PDFlink, "THE STATE OF THE WORLD'S CITIES REPORT 2001", UN-HABITAT, 21 June 2006
19. P. De Groote, Economic and Tourism Aspects of the Olympic Games, GaWC, Loughborough University, 21 September 2005
20. Template:PDFlink (registration required)
21. K. O'Connor, International Students and Global Cities, GaWC, Loughborough University, 17 February 2005
22. World Heritage List, UNESCO
23. "Estimated Ridership of the World's Largest Public Transit Systems, 1998". People.hofstra.edu. Retrieved 9 May 2012.
24. Template:PDFlink, October 2003
25. "Traffic Intensity by International Urban Area: 1990". Publicpurpose.com. Retrieved 9 May 2012.
26. Largest seaports of the world
27. Mapping the Global Network Economy on the Basis of Air Passenger Transport Flows, GaWC, Loughborough University, 8 December 2004
28. "The World's Best Skylines". Homepages.ipact.nl. Retrieved 9 May 2012.
29. Global Cities in Informational Societies – Article at the University of Brasilia, UNESCO doc.
30. "The World According to GaWC 2010". Globalization and World Cities (GaWC) Study Group and Network. Loughborough University. Retrieved 15 September 2011.
31. "The 2008 Global Cities Index". Foreign Policy (November/December 2008). 21 October 2008. Retrieved 31 October 2008.
32. "2012 Global Cities Index and Emerging Cities Outlook" (PDF). Retrieved 9 May 2012.
33. "The Global City Competitiveness Index". Managementthinking.eiu.com. 12 March 2012. Retrieved 9 May 2012.
34. "Global Power City Index 2010" (PDF). Tokyo, Japan: Institute for Urban Strategies at The Mori Memorial Foundation. October, 2010. Retrieved 2012-02-26. {{cite journal}}: Check date values in: |date= (help); Cite journal requires |journal= (help)
35. The Wealth Report 2010, Knightfrank.com, 25. March 2010
36. "Revealed: Cities that rule the world". CNN. 10 April 2010.
37. "The Wealth Report 2011" (PDF). Knight Frank LLP.
38. "Cities: largest (without surrounding suburban areas)". Geohive. Retrieved 3 August 2011.
39. R.L. Forstall, R.P. Greene, and J.B. Pick, "Which are the largest? Why published populations for major world urban areas vary so greatly", City Futures Conference, (University of Illinois at Chicago, July 2004) – Table 5 (p.34)
40. "Global City Migration Map". Migrationinformation.org. Retrieved 9 May 2012.
41. PriceWaterhouseCoopers, "UK Economic Outlook, March 2007", page 5. "Table 1.2 – Top 30 urban agglomeration GDP rankings in 2005 and illustrative projections to 2020 (using UN definitions and population estimates)". Archived from the original (PDF) on 10 June 2007. Retrieved 9 March 2007.{{cite web}}: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link)

External links

• Repository of Links Relating to Urban Places
• World Cities article by Jennifer Curtis of Charles Sturt University
• The World-System’s City System: A Research Agenda by Jeffrey Kentor and Michael Timberlake of the University of Utah and David Smith of University of California, Irvine
• The State of the World's Cities, 2001, UN Human Settlements Programme
• "U.S. Cities in the 'World City Network'", by Peter J. Taylor and Robert E. Lang, February 2005 (Full Report in PDF)

• Use dmy dates from May 2012
• City
• Metropolitan areas
• Loughborough University
• Lists of cities
• Globalization terminology
• Globalization-related lists
• Globalization-related indices