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Steep and flat size distributions:
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Flat = all the settlements are about the same
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size
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Steep= there is one big settlements, no middle-
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sized ones, and a lot of small ones. This is also
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called “urban primacy”
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The lognormal and rank-size distributions.
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Rank-size: the second largest settlement is one
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half as large as the largest settlement, the third
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largest is one third as large, and so forth.
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