What three world cities stand out in a class of their own?
--Tokyo, London, and New York stand out in catagory of their own
X each is the largest city in one of 3 main regions of more developed world
X world's most important stock eschange operates here
X contain large concentrations of financial and realted business services
-- second tier of major world cities includes Chicago, LA, Washington DC, Frankfurt, Brussels, Paris, Zurich (Western Europe), and Sao Paulo and Singapre (only two in LDC regions)
X major corps may have headquarters here
-- third tier of secondary world cities includes Houston, Miami, San Francisco, Toronto, Bangkok, Bombay, Hong Kong, Manila, Osaka, Seoul, Taipei, Berlin, Madrid, Milan, Rotterdam, Vienna, Buenos Aires, Caracus, Mexico City, Rio de Janeiro, Johannesburg (Africa), and Sydney