actual cohort

Japanese: actual cohort(英語表記)actualcohort
actual cohort

…Cohort is the same as the commonly used term generation, but because the concept of generation has a broad meaning in sociology, the concept of cohort has come to be used to distinguish it as something specific to demography. When calculating how many children a group of girls born in a certain year will give birth to in their lifetime, or the death rate of the population born in a certain year, this is called the fertility or mortality rate (or survival rate) of the actual cohort. However, when considering how many children will be born over the course of a lifetime given the fertility rate (birth rate of multiple cohorts) of the female population by age in a certain year, these cohorts are called hypothetical cohorts. …

*Some explanations of terms that mention "actual cohort" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…コーホートは,今まで一般に使用されてきた世代generationにあたるものであるが,世代概念は社会学の広い意義をもっているため,人口学上の特有のものとして区別するためにコーホートの概念が使用されるに至った。ある年次に生まれた出生女児集団が一生涯にどのくらいの子どもを産んだか,またある年次の出生の人口がどのような死亡率で死亡していったかを計算する場合,これを〈実際コーホートactual cohort〉の出生力とか死亡率(あるいは生残率)とよばれる。しかし,ある年次の年齢別の女子人口の特殊出生率(多数のコーホートの出生率)をもって,生涯を経過している間にどのくらいの出生児を産むことになるかを考えた場合,これらのコーホートを〈仮設コーホートhypothetical cohort〉という。…

※「actual cohort」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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