Economy of New York City feet (37.2 million m) that same year, is the largest central business district in the world. New York City is distinctive for its high concentrations of advanced service sector firms in the law, accountancy, banking and management consultancy fields. It is the top global center for the advertising industry, which is metonymously called "Madison Avenue". Silicon Alley, metonymous for New York's broad-spectrum high technology sphere, continues to expand. Finance, high technology, real estate, insurance, and health care all form the basis of New York's economy. The city is also the nation's most important center for mass media, journalism, and publishing.
The Concentration City The Concentration City "The Concentration City" is a dystopian short story by British author J. G. Ballard, first published, under the title "Build-Up", in "New Worlds" volume 19 number 55 in January 1957. It was reprinted in the collections "Billennium" and "Chronopolis" and later, under its revised title, in "The Disaster Area" and "". "The Concentration City" is set in a "city" encompassing everything in known existence to its inhabitants. The districts comprise endless streets and buildings and seemingly infinitely high and low levels, or floors, with few trees and little wildlife. Cubic space is in shortage and expensive. High