Constant global population with demographic heterogeneity
To understand better a possible future constant global population that is demographically heterogeneous, this paper analyzes several models. Classical theory of stationary populations generally fails to apply. However, if constant global population size P(global) is the sum of all country population...
| Main Author: | |
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| Format: | Article |
| Language: | English |
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Max Planck Institute for Demographic Research
2008-05-01
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| Series: | Demographic Research |
| Subjects: | |
| Online Access: | http://www.demographic-research.org/volumes/vol18/14/ |
| _version_ | 1811338963128942592 |
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| author | Joel E. Cohen |
| author_facet | Joel E. Cohen |
| author_sort | Joel E. Cohen |
| collection | DOAJ |
| description | To understand better a possible future constant global population that is demographically heterogeneous, this paper analyzes several models. Classical theory of stationary populations generally fails to apply. However, if constant global population size P(global) is the sum of all country population sizes, and if constant global annual number of births B(global) is the sum of the annual number of births of all countries, and if constant global life expectancy at birth e(global) is the population-weighted mean of the life expectancy at birth of all countries, then B(global) x e(global) always exceeds P(global) unless all countries have the same life expectancy at birth. |
| first_indexed | 2024-04-13T18:18:16Z |
| format | Article |
| id | doaj.art-a1a3ec8dc0f14001a7c9fa8593bc5210 |
| institution | Directory Open Access Journal |
| issn | 1435-9871 |
| language | English |
| last_indexed | 2024-04-13T18:18:16Z |
| publishDate | 2008-05-01 |
| publisher | Max Planck Institute for Demographic Research |
| record_format | Article |
| series | Demographic Research |
| spelling | doaj.art-a1a3ec8dc0f14001a7c9fa8593bc52102022-12-22T02:35:35ZengMax Planck Institute for Demographic ResearchDemographic Research1435-98712008-05-011814Constant global population with demographic heterogeneityJoel E. CohenTo understand better a possible future constant global population that is demographically heterogeneous, this paper analyzes several models. Classical theory of stationary populations generally fails to apply. However, if constant global population size P(global) is the sum of all country population sizes, and if constant global annual number of births B(global) is the sum of the annual number of births of all countries, and if constant global life expectancy at birth e(global) is the population-weighted mean of the life expectancy at birth of all countries, then B(global) x e(global) always exceeds P(global) unless all countries have the same life expectancy at birth.http://www.demographic-research.org/volumes/vol18/14/average ageCauchy-Schwarz inequalityconstant populationheterogeneitylife expectancymigrationpensionspopulation projectionstationary populationzero population growth |
| spellingShingle | Joel E. Cohen Constant global population with demographic heterogeneity Demographic Research average age Cauchy-Schwarz inequality constant population heterogeneity life expectancy migration pensions population projection stationary population zero population growth |
| title | Constant global population with demographic heterogeneity |
| title_full | Constant global population with demographic heterogeneity |
| title_fullStr | Constant global population with demographic heterogeneity |
| title_full_unstemmed | Constant global population with demographic heterogeneity |
| title_short | Constant global population with demographic heterogeneity |
| title_sort | constant global population with demographic heterogeneity |
| topic | average age Cauchy-Schwarz inequality constant population heterogeneity life expectancy migration pensions population projection stationary population zero population growth |
| url | http://www.demographic-research.org/volumes/vol18/14/ |
| work_keys_str_mv | AT joelecohen constantglobalpopulationwithdemographicheterogeneity |