Edited by Peter Karl Kresl and Jaime Sobrino
Chapter 14: Urban demographic growth: the case of megacities
One of the main facts about contemporary urbanization consists of the accelerated increase in the number of megacities. Megacities have been defined by the United Nations (UN) as urban concentrations containing more than 10 million people (United Nations, 2010). In 1950 there were only two metropolises reaching that number (New York and Tokyo), while in 1980 two more were added (Mexico City and São Paolo), and for 2010 there were 21, where 324 million people were living, 4.7 percent of the world population. The objective of this chapter is to analyse the evolution of megacities from a demographic perspective, their role on the urban national systems where they are located, and their economic and competitiveness importance in the global sphere.
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