手法を比較

	Population Pyramid Analysis	Total Fertility Rate
分野	人口学	人口学
系統	Process / pipeline	Process / pipeline
提唱年	1874	2001
提唱者	Francis A. Walker (early age-sex diagrams); standard demographic practice	Classical demographic index (formalized by Preston, Heuveline & Guillot)
種類	Graphical and tabular analysis of population age-sex structure	Period summary fertility index synthesizing age-specific fertility rates
原典	Preston, S. H., Heuveline, P., & Guillot, M. (2001). Demography: Measuring and Modeling Population Processes. Blackwell. ISBN: 9781557864512	Preston, S. H., Heuveline, P., & Guillot, M. (2001). Demography: Measuring and Modeling Population Processes. Blackwell. ISBN: 9781557864512
別名	Age-sex pyramid, Population age structure diagram, Age structure analysis, Nüfus Piramidi Analizi	TFR, Period total fertility rate, Sum of age-specific fertility rates, Toplam Doğurganlık Hızı
関連	4	4
概要	Population pyramid analysis is the description and interpretation of a population's age-sex structure through a back-to-back horizontal bar chart, with males on one side, females on the other, and age groups stacked from youngest at the bottom to oldest at the top. The shape of the pyramid encodes a population's fertility, mortality, and migration history and is the demographer's first diagnostic of whether a population is young and growing, ageing, or contracting.	The total fertility rate (TFR) is the central period measure of fertility in demography: the average number of children a woman would bear over her lifetime if she experienced, at each age, the age-specific fertility rates observed in a given year. Computed by summing age-specific fertility rates across the reproductive ages, the TFR removes the influence of population age structure and gives a single, intuitive figure — children per woman — that is comparable across populations and over time.