Letting cities develop naturally

A look at the world map tells us that countries and cities vary greatly in size, and that there are many more small cities than there are big ones. Interestingly, such uneven distribution of city sizes can be quite accurately described by a mathematical relationship known as the power law. For example, the population of the largest city in a country is approximately twice the size of the second largest city and thrice the size of the third largest one.

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