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Among them, the total permanent population of Chongqing, Shanghai, Beijing and Chengdu is above 20 million. [7] Shanghai is China's most populous urban area, [ 8 ] [ 9 ] while Chongqing is its largest city proper , the only city in China with the largest permanent population of over 30 million.
Chengdu [a] is the capital city of the Chinese province of Sichuan. With a population of 20,937,757 at the 2020 census, [5] it is the fourth most populous city in China, and it is the only city with a population of over 20 million apart from direct-administered municipalities. It is traditionally the hub of Western China. Chengdu is in central ...
The Demographic Window is defined to be that period of time in a nation's demographic evolution when the proportion of population of working age group is particularly prominent. This occurs when the demographic architecture of a population becomes younger and the percentage of people able to work reaches its height.
The population of the More Developed regions is slated to remain mostly unchanged, at 1.2-1.3 billion for the remainder of the 21st century. All population growth comes from the Less Developed regions. [6] [7] The table below breaks out the UN's future population growth predictions by region [6] [7]
Demographic economics or population economics is the application of economic analysis to demography, the study of human populations, including size, growth, density, distribution, and vital statistics.
P 0 = P(0) is the initial population size, r = the population growth rate, which Ronald Fisher called the Malthusian parameter of population growth in The Genetical Theory of Natural Selection, [2] and Alfred J. Lotka called the intrinsic rate of increase, [3] [4] t = time. The model can also be written in the form of a differential equation:
The number shown is the average annual growth rate for the period. Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship—except for refugees not permanently settled in the country of asylum, who are generally considered part of the population of the country of origin ...