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A primate city is the leading city in its country or region, disproportionately larger than any others in the urban hierarchy.[1] A 'primate city distribution' has one very large city with many much smaller cities and towns, and no intermediate-sized urban centres, in contrast to the linear 'rank-size distribution'.[2] The 'law of the primate city' was first proposed by the geographer Mark Jefferson in 1939.[3] He defines a primate city as being "at least twice as large as the next largest city and more than twice as significant."[4]
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Not all countries have primate cities, but in those that do, the rest of the country depends on it for cultural, economic, political, and major transportation needs.
The presence of a primate city in a country may indicate an imbalance in development — usually a progressive core, and a lagging periphery, on which the primate city depends for labor and other resources.[5] However, the urban structure is not directly dependent on a country's level of economic development.[1]
Among the best known examples of primate cities are alpha world cities of London, and Paris.[6]
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