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Multilingual Demographic Dictionary, second unified edition, English volume
Length of a generation
| Translation | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Section | English 713 |
Arabic 713 |
German 713 |
Spanish 713 |
Finnish 713 |
French 713 |
Italian 713 |
Polish 713 |
Portuguese 713 |
Russian 713 |
| 713-1 | length of a generation —mean interval between successive generations |
مدة الجيل (جيل) | durchschnittliche Generationsdauer —durchschnittlicher Generationsabstand |
duración media de una generación —intervalo entre generaciones sucesivas |
sukupolvien keskietäisyys —sukupolven keskimääräinen pituus |
durée moyenne d’une génération —intervalle entre générations successives |
durata media di una generazione —intervallo medio fra generazioni successive |
długość trwania generacji —odstęp czasu między kolejnymi generacjami |
GERAÇÃO duração —INTERVALO médio entre gerações sucessivas |
Длительность воспроизводственного цикла —Средняя длина поколения —Интервал между смежными поколениями |
| 713-2 | average age of mother | عمر المتوسط للأمهات (أم) | durchschnittliches Alter der Mütter | edad media de las madres | synnyttäjien keski-ikä | âge moyen des mères | età media delle madri | średni wiek matek | IDADE média das mães | Средний возраст матери |
| 713-3 | hypothetical cohort —fictitious cohort —synthetic cohort |
أجيال وهمية (جيل)—أجيال خيالية (جيل) | fiktive Generation | generaciones hipotéticas —generaciones ficticias |
hypoteettinen sukupolvi | génération hypothétique —génération fictive |
generazione fittizia —generazione ipotetica |
generacje hipotetyczne —generacje fikcyjne |
GERAÇÃO hipotética —GERAÇÃO fictícia —GERAÇÃO sintética |
Гипотетический контингент —Фиктивный контингент |
The net reproduction rate (711-3) and the intrinsic rate of natural increase (703-1) are closely related to one another. The net reproduction rate measures the increase in the stable population (703-2) implied by the given age-specific fertility and mortality rates over a period equivalent to the mean length of a generation 1 or the mean interval between successive generations 1. This length of a female generation is equal to the mean age of mothers 2 giving birth to live daughters, with current age-specific fertility and mortality rates. Period reproduction rates are current indices (cf. 152) which relate to hypothetical cohorts 3 or synthetic cohorts 3.
- 2. The mean age of fertility, i.e., the mean age of the fertility schedule is only approximately equal to the mean length of a generation. The mean length of a male generation similarly is equal to the mean age of fathers at the birth of their children.
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