Millionaire cities, mega cities and world cities

Millionaire cities: Cities with a million people or just over

• In 1950 there were 83 millionaire cities
• In 1997 there were 285
• In 2005 there were 336

Mega cities: Cities with over 10 million people, population density of over 2,000 per km^2 

• Most in developed world 1980's
• By 1995 25% of worlds mega cities were in developed world
• In 2003 just 4% of the worlds population lived in mega cities 

World cities: A world city dominates beyond it's national border: LONDON. A city that acts as a major centre for: 

• Finance
• Trade and business
•  Politics
• Culture
• Science
• Information gathering 
• Publishing and mass media 
• Retail