Saskia Sassen defined a global city as a place where economic activity is primarily international and identified New York, Tokyo, and London as the three primary global cities based on their economic roles. Other commentators have since expanded on the criteria used to determine what constitutes a global city beyond just economic factors.

6. • Saskia Sassen
• Define global city were it is
primary economic
• Identified three global cities;
New York, Tokyo and London

10. • Other commentators
expanded the criteria that
Sassen used to determined
what constitutes global city

11. commentators expanded the criteria

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