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Multilingual Demographic Dictionary, second unified edition, English volume

Difference between revisions of "Intrinsic rate of natural increase"

Multilingual Demographic Dictionary, second unified edition, English vol.
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(Eugen Grebenik et al., first edition 1958)
(Etienne van de Walle et al., second 1982 edition)
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<!--'''intrinsic rate of natural increase'''-->
 
<!--'''intrinsic rate of natural increase'''-->
{{TextTerms|S=703|P=70|Ed=I|CompleteIndexTerm=(INTRINSIC rate of natural increase)| content=
+
{{TextTerms|S=703|P=70|Ed=II|CompleteIndexTerm=(INTRINSIC rate of natural increase)| content=
 
{{NewLineT|S=703|N=1}} {{
 
{{NewLineT|S=703|N=1}} {{
TofT|Lang=en|Ed=I|N=1|Color=yes|Te=intrinsic rate of natural increase}}{{
+
TofT|Lang=en|Ed=II|N=1|Color=yes|Te=intrinsic rate of natural increase}}{{
TofT|Lang=en|Ed=I|N=1|SubN=2|Te=true rate of natural increase}}{{
+
TofT|Lang=ar|Ed=II|N=1|Te=معدل الصميم للزيادة الطبيعية}}{{
TofT|Lang=ar|Ed=I|N=1|Te=معدل الصميم للزيادة الطبيعية (صميم)}}{{
+
TofT|Lang=cs|Ed=II|N=1|Color=yes|Te=vnitřní míra přirozeného přírůstku}}{{
TofT|Lang=de|Ed=I|N=1|Color=yes|Te=wesentliche Zuwachsrate}}{{
+
TofT|Lang=de|Ed=II|N=1|Te=stabile Wachstumsrate}}{{
TofT|Lang=es|Ed=I|N=1|Te=tasa intrínseca de crecimiento natural}}{{
+
TofT|Lang=de|Ed=II|N=1|SubN=2|Te=intrinsische Wachstumsrate}}{{
TofT|Lang=fi|Ed=I|N=1|Color=yes|Te=vakaa lisääntyneisyysluku}}{{
+
TofT|Lang=es|Ed=II|N=1|Color=yes|Te=tasa intrínseca de crecimiento natural}}{{
TofT|Lang=fr|Ed=I|N=1|Te=taux intrinsèque d’accroissement naturel}}{{
+
TofT|Lang=fr|Ed=II|N=1|Te=taux intrinsèque d’accroissement naturel}}{{
TofT|Lang=it|Ed=I|N=1|Color=yes|Te=saggio intrinseco d’incremento naturale}}{{
+
TofT|Lang=it|Ed=II|N=1|Color=yes|Te=tasso intrinseco di incremento naturale}}{{
TofT|Lang=it|Ed=I|N=1|SubN=2|Te=saggio vero d’incremento naturale}}{{
+
TofT|Lang=it|Ed=II|N=1|SubN=2|Te=incremento naturale}}{{
TofT|Lang=pl|Ed=I|N=1|Te=istotna stopa przyrostu}}{{
+
TofT|Lang=ja|Ed=II|N=1|Te=安定人口増加率(または真性自然増加率)}}{{
TofT|Lang=pt|Ed=I|N=1|Color=yes|Te=TAXA de crescimento natural intrínseca}}{{
+
TofT|Lang=pt|Ed=II|N=1|Color=yes|Te=taxa intrínseca de crescimento natural}}{{
TofT|Lang=pt|Ed=I|N=1|SubN=2|Te=TAXA de crescimento vegetativo legítima}}{{
+
TofT|Lang=ru|Ed=II|N=1|Te=Истинный коэффициент естественного прироста}}{{
TofT|Lang=ru|Ed=I|N=1|Te=Истинный коэффициент естественного прироста}}
+
TofT|Lang=zh|Ed=II|N=1|Color=yes|Te=内在自然增长率}}
 
{{NewLineT|S=703|N=2}} {{
 
{{NewLineT|S=703|N=2}} {{
TofT|Lang=en|Ed=I|N=2|Color=yes|Te=stable population}}{{
+
TofT|Lang=en|Ed=II|N=2|Color=yes|Te=stable population}}{{
TofT|Lang=ar|Ed=I|N=2|Te=مجتمع المستقر (مجتمع)}}{{
+
TofT|Lang=ar|Ed=II|N=2|Te=مجتمع المستقر}}{{
TofT|Lang=de|Ed=I|N=2|Color=yes|Te=stabile Bevölkerung}}{{
+
TofT|Lang=cs|Ed=II|N=2|Color=yes|Te=stabilní populace}}{{
TofT|Lang=es|Ed=I|N=2|Te=población estable}}{{
+
TofT|Lang=de|Ed=II|N=2|Te=stabile Bevölkerung}}{{
TofT|Lang=fi|Ed=I|N=2|Color=yes|Te=stabiili väestö}}{{
+
TofT|Lang=es|Ed=II|N=2|Color=yes|Te=población estable}}{{
TofT|Lang=fr|Ed=I|N=2|Te=population stable}}{{
+
TofT|Lang=fr|Ed=II|N=2|Te=population stable}}{{
TofT|Lang=it|Ed=I|N=2|Color=yes|Te=popolazione stabile}}{{
+
TofT|Lang=it|Ed=II|N=2|Color=yes|Te=popolazione stabile}}{{
TofT|Lang=pl|Ed=I|N=2|Te=ludność ustabilizowana}}{{
+
TofT|Lang=ja|Ed=II|N=2|Te=安定人口}}{{
TofT|Lang=pt|Ed=I|N=2|Color=yes|Te=POPULAÇÃO estável}}{{
+
TofT|Lang=pt|Ed=II|N=2|Color=yes|Te=população estável}}{{
TofT|Lang=ru|Ed=I|N=2|Te=Стабильное население}}
+
TofT|Lang=ru|Ed=II|N=2|Te=Стабильное население}}{{
 +
TofT|Lang=zh|Ed=II|N=2|Color=yes|Te=稳定人口}}
 
{{NewLineT|S=703|N=3}} {{
 
{{NewLineT|S=703|N=3}} {{
TofT|Lang=en|Ed=I|N=3|Color=yes|Te=stable age distribution}}{{
+
TofT|Lang=en|Ed=II|N=3|Color=yes|Te=stable age distribution}}{{
TofT|Lang=ar|Ed=I|N=3|Te=تركيب عمري مستقل (عمر)}}{{
+
TofT|Lang=ar|Ed=II|N=3|Te=توزع عمري مستقر}}{{
TofT|Lang=de|Ed=I|N=3|Color=yes|Te=stabiler Altersaufbau}}{{
+
TofT|Lang=cs|Ed=II|N=3|Color=yes|Te=stabilní věková struktura}}{{
TofT|Lang=es|Ed=I|N=3|Te=composición estable por edades}}{{
+
TofT|Lang=de|Ed=II|N=3|Te=stabile(r) Altersaufbau}}{{
TofT|Lang=fi|Ed=I|N=3|Color=yes|Te=ikärakenne vakaa}}{{
+
TofT|Lang=es|Ed=II|N=3|Color=yes|Te=composición por edades de la población estable}}{{
TofT|Lang=fr|Ed=I|N=3|Te=composition par âge stable}}{{
+
TofT|Lang=es|Ed=II|N=3|SubN=2|Te=composición estable por edades}}{{
TofT|Lang=it|Ed=I|N=3|Color=yes|Te=distribuzione per età stabile}}{{
+
TofT|Lang=fr|Ed=II|N=3|Te=répartition par âges stable}}{{
TofT|Lang=it|Ed=I|N=3|SubN=2|Te=composizione per età stabile}}{{
+
TofT|Lang=it|Ed=II|N=3|Color=yes|Te=distribuzione per età stabile}}{{
TofT|Lang=pl|Ed=I|N=3|Te=stała struktura wieku}}{{
+
TofT|Lang=ja|Ed=II|N=3|Te=安定的年齢分布}}{{
TofT|Lang=pt|Ed=I|N=3|Color=yes|Te=DISTRIBUIÇÃO estável por idade}}{{
+
TofT|Lang=pt|Ed=II|N=3|Color=yes|Te=distribuição por idade estável}}{{
TofT|Lang=ru|Ed=I|N=3|Te=Стабильное распределение по возрастным группам}}
+
TofT|Lang=ru|Ed=II|N=3|Te=Стабильная возрастная структура}}{{
 +
TofT|Lang=zh|Ed=II|N=3|Color=yes|Te=稳定年龄分布}}
 
{{NewLineT|S=703|N=4}} {{
 
{{NewLineT|S=703|N=4}} {{
TofT|Lang=en|Ed=I|N=4|Color=yes|Te=initial age distribution}}{{
+
TofT|Lang=en|Ed=II|N=4|Color=yes|Te=initial age distribution}}{{
TofT|Lang=ar|Ed=I|N=4|Te=تركيب العمري الابتدائي (بدا)}}{{
+
TofT|Lang=ar|Ed=II|N=4|Te=توزع العمري الإبتدائي}}{{
TofT|Lang=de|Ed=I|N=4|Color=yes|Te=Ausgangs-Altersaufbau}}{{
+
TofT|Lang=cs|Ed=II|N=4|Color=yes|Te=výchozí věková struktura}}{{
TofT|Lang=es|Ed=I|N=4|Te=composición inicial por edades}}{{
+
TofT|Lang=de|Ed=II|N=4|Te=ursprüngliche(r) Altersaufbau}}{{
TofT|Lang=fi|Ed=I|N=4|Color=yes|Te=alkuperäinen ikärakenne}}{{
+
TofT|Lang=es|Ed=II|N=4|Color=yes|Te=composición inicial por edades}}{{
TofT|Lang=fr|Ed=I|N=4|Te=composition par âge initiale}}{{
+
TofT|Lang=fr|Ed=II|N=4|Te=répartition par âges initiale}}{{
TofT|Lang=it|Ed=I|N=4|Color=yes|Te=distribuzione per età iniziale}}{{
+
TofT|Lang=it|Ed=II|N=4|Color=yes|Te=distribuzione per età iniziale}}{{
TofT|Lang=it|Ed=I|N=4|SubN=2|Te=composizione per età iniziale}}{{
+
TofT|Lang=ja|Ed=II|N=4|Te=初期の年齢分布}}{{
TofT|Lang=pl|Ed=I|N=4|Te=początkowa struktura wieku}}{{
+
TofT|Lang=pt|Ed=II|N=4|Color=yes|Te=distribuição inicial por idade}}{{
TofT|Lang=pt|Ed=I|N=4|Color=yes|Te=DISTRIBUIÇÃO inicial por idade}}{{
+
TofT|Lang=ru|Ed=II|N=4|Te=Исходная возрастная структура}}{{
TofT|Lang=ru|Ed=I|N=4|Te=Начальное повозрастное распределение}}
+
TofT|Lang=zh|Ed=II|N=4|Color=yes|Te=最初年龄分布}}
 
{{NewLineT|S=703|N=5}} {{
 
{{NewLineT|S=703|N=5}} {{
TofT|Lang=en|Ed=I|N=5|Color=yes|Te=growth, potential}}{{
+
TofT|Lang=en|Ed=II|N=5|Color=yes|Te=growth potential}}{{
TofT|Lang=ar|Ed=I|N=5|Te=كمون الزيادة (كمون)}}{{
+
TofT|Lang=ar|Ed=II|N=5|Te=كمون النمو}}{{
TofT|Lang=de|Ed=I|N=5|Color=yes|Te=potentieller Zuwachs}}{{
+
TofT|Lang=cs|Ed=II|N=5|Color=yes|Te=potenciální růst}}{{
TofT|Lang=es|Ed=I|N=5|Te=potencial de crecimiento}}{{
+
TofT|Lang=de|Ed=II|N=5|Te=Wachstumspotential}}{{
TofT|Lang=fi|Ed=I|N=5|Color=yes|Te=kasvupotentiaali}}{{
+
TofT|Lang=es|Ed=II|N=5|Color=yes|Te=potencial de crecimiento}}{{
TofT|Lang=fr|Ed=I|N=5|Te=potentiel d’accroissement}}{{
+
TofT|Lang=fr|Ed=II|N=5|Te=potentiel d’accroissement}}{{
TofT|Lang=it|Ed=I|N=5|Color=yes|Te=potenziale d’incremento}}{{
+
TofT|Lang=it|Ed=II|N=5|Color=yes|Te=potenziale d’incremento}}{{
TofT|Lang=pl|Ed=I|N=5|Te=potencjalny wzrost (liczby ludności)}}{{
+
TofT|Lang=ja|Ed=II|N=5|Te=潜在成長力}}{{
TofT|Lang=pt|Ed=I|N=5|Color=yes|Te=POTENCIAL de crescimento}}{{
+
TofT|Lang=pt|Ed=II|N=5|Color=yes|Te=potencial de crescimento}}{{
TofT|Lang=ru|Ed=I|N=5|Te=Потенциальный рост населения}}
+
TofT|Lang=ru|Ed=II|N=5|Te=Потенциал роста}}{{
 +
TofT|Lang=zh|Ed=II|N=5|Color=yes|Te=增长潜力}}
 
{{NewLineT|S=703|N=6}} {{
 
{{NewLineT|S=703|N=6}} {{
TofT|Lang=en|Ed=I|N=6|Color=yes|Te=stationary population}}{{
+
TofT|Lang=en|Ed=II|N=6|Color=yes|Te=stationary population}}{{
TofT|Lang=ar|Ed=I|N=6|Te=مجتمع المتوقف (موقف)}}{{
+
TofT|Lang=ar|Ed=II|N=6|Te=مجتمع المتوقف}}{{
TofT|Lang=de|Ed=I|N=6|Color=yes|Te=stationäre Bevölkerung}}{{
+
TofT|Lang=cs|Ed=II|N=6|Color=yes|Te=stacionární populace}}{{
TofT|Lang=es|Ed=I|N=6|Te=población estacionaria}}{{
+
TofT|Lang=de|Ed=II|N=6|Te=stationäre Bevölkerung}}{{
TofT|Lang=fi|Ed=I|N=6|Color=yes|Te=stationäärinen väestö}}{{
+
TofT|Lang=es|Ed=II|N=6|Color=yes|Te=población estacionaria}}{{
TofT|Lang=fi|Ed=I|N=6|SubN=2|Te=vakioväestö}}{{
+
TofT|Lang=es|Ed=II|N=6|SubN=2|Te=tabla de mortalidad}}{{
TofT|Lang=fr|Ed=I|N=6|Te=population stationnaire}}{{
+
TofT|Lang=fr|Ed=II|N=6|Te=population stationnaire}}{{
TofT|Lang=it|Ed=I|N=6|Color=yes|Te=popolazione stazionaria}}{{
+
TofT|Lang=fr|Ed=II|N=6|SubN=2|Te=population de la table de mortalité}}{{
TofT|Lang=pl|Ed=I|N=6|Te=ludność zastojowa}}{{
+
TofT|Lang=it|Ed=II|N=6|Color=yes|Te=popolazione stazionaria}}{{
TofT|Lang=pt|Ed=I|N=6|Color=yes|Te=POPULAÇÃO estacionaria}}{{
+
TofT|Lang=it|Ed=II|N=6|SubN=2|Te=popolazione della tavola di mortalità}}{{
TofT|Lang=ru|Ed=I|N=6|Te=Стационарное население}}
+
TofT|Lang=ja|Ed=II|N=6|Te=定常(静止)人口}}{{
 +
TofT|Lang=pt|Ed=II|N=6|Color=yes|Te=população estacionária}}{{
 +
TofT|Lang=ru|Ed=II|N=6|Te=Стационарное население}}{{
 +
TofT|Lang=zh|Ed=II|N=6|Color=yes|Te=作静止人口}}
 
{{NewLineT|S=703|N=7}} {{
 
{{NewLineT|S=703|N=7}} {{
TofT|Lang=en|Ed=I|N=7|Color=yes|Te=logistic population}}{{
+
TofT|Lang=en|Ed=II|N=7|Color=yes|Te=quasi-stable population}}{{
TofT|Lang=ar|Ed=I|N=7|Te=مجتمع اللوجستيكي ״الامدادي״ (مد)}}{{
+
TofT|Lang=ar|Ed=II|N=7|Te=مجتمع شبه المستقر}}{{
TofT|Lang=de|Ed=I|N=7|Color=yes|Te=logistische Bevölkerung}}{{
+
TofT|Lang=cs|Ed=II|N=7|Color=yes|Te=kvazistabilní populace}}{{
TofT|Lang=es|Ed=I|N=7|Te=población logística}}{{
+
TofT|Lang=de|Ed=II|N=7|Te=quasi-stabile Bevölkerung}}{{
TofT|Lang=fi|Ed=I|N=7|Color=yes|Te=logistinen väestö}}{{
+
TofT|Lang=es|Ed=II|N=7|Color=yes|Te=población cuasi estable}}{{
TofT|Lang=fr|Ed=I|N=7|Te=population logistique}}{{
+
TofT|Lang=fr|Ed=II|N=7|Te=population quasi stable}}{{
TofT|Lang=it|Ed=I|N=7|Color=yes|Te=popolazione logistica}}{{
+
TofT|Lang=it|Ed=II|N=7|Color=yes|Te=popolazione quasi stabile}}{{
TofT|Lang=pl|Ed=I|N=7|Te=ludność logistyczna}}{{
+
TofT|Lang=ja|Ed=II|N=7|Te=準安定人口}}{{
TofT|Lang=pt|Ed=I|N=7|Color=yes|Te=POPULAÇÃO logística}}{{
+
TofT|Lang=pt|Ed=II|N=7|Color=yes|Te=população quase-estável}}{{
TofT|Lang=ru|Ed=I|N=7|Te=Логигческий рост населения}}|
+
TofT|Lang=ru|Ed=II|N=7|Te=Квази-стабильное население}}{{
Lang=en|Lang2=ar|Lang3=de|Lang4=es|Lang5=fi|Lang6=fr|Lang7=it|Lang8=pl|Lang9=pt|Lang10=ru}}
+
TofT|Lang=zh|Ed=II|N=7|Color=yes|Te=准稳定人口}}
 +
{{NewLineT|S=703|N=8}} {{
 +
TofT|Lang=en|Ed=II|N=8|Color=yes|Te=}}{{
 +
TofT|Lang=ar|Ed=II|N=8|Te=مجتمع نصف المستقر}}{{
 +
TofT|Lang=cs|Ed=II|N=8|Color=yes|Te=}}{{
 +
TofT|Lang=de|Ed=II|N=8|Te=pseudo-stabile Bevölkerung}}{{
 +
TofT|Lang=es|Ed=II|N=8|Color=yes|Te=poblaciones semi-estables}}{{
 +
TofT|Lang=fr|Ed=II|N=8|Te=population semi-stable}}{{
 +
TofT|Lang=it|Ed=II|N=8|Color=yes|Te=popolazioni quasi stabili}}
 +
{{NewLineT|S=703|N=9}} {{
 +
TofT|Lang=en|Ed=II|N=9|Color=yes|Te=logistic population}}{{
 +
TofT|Lang=ar|Ed=II|N=9|Te=مجتمع الإمدادي}}{{
 +
TofT|Lang=cs|Ed=II|N=9|Color=yes|Te=logistická populace}}{{
 +
TofT|Lang=de|Ed=II|N=9|Te=logistische(s) Bevölkerung}}{{
 +
TofT|Lang=es|Ed=II|N=9|Color=yes|Te=población logística}}{{
 +
TofT|Lang=fr|Ed=II|N=9|Te=population logistique}}{{
 +
TofT|Lang=it|Ed=II|N=9|Color=yes|Te=popolazione logistica}}{{
 +
TofT|Lang=ja|Ed=II|N=9|Te=ロジスティック型人口}}{{
 +
TofT|Lang=pt|Ed=II|N=9|Color=yes|Te=população logística}}{{
 +
TofT|Lang=ru|Ed=II|N=9|Te=Логистический рост населения}}{{
 +
TofT|Lang=zh|Ed=II|N=9|Color=yes|Te=罗吉斯蒂人口}}
 +
{{NewLineT|S=703|N=10}} {{
 +
TofT|Lang=en|Ed=II|N=10|Color=yes|Te=logistic law}}{{
 +
TofT|Lang=ar|Ed=II|N=10|Te=قائمة}}{{
 +
TofT|Lang=cs|Ed=II|N=10|Color=yes|Te=logistická funkce}}{{
 +
TofT|Lang=de|Ed=II|N=10|Te=Gesetz des logistischen Wachstums}}{{
 +
TofT|Lang=es|Ed=II|N=10|Color=yes|Te=función logística}}{{
 +
TofT|Lang=es|Ed=II|N=10|SubN=2|Te=ley logística}}{{
 +
TofT|Lang=fr|Ed=II|N=10|Te=loi logistique}}{{
 +
TofT|Lang=it|Ed=II|N=10|Color=yes|Te=legge logistica}}{{
 +
TofT|Lang=ja|Ed=II|N=10|Te=ロジスティック法則}}{{
 +
TofT|Lang=pt|Ed=II|N=10|Color=yes|Te=função logística}}{{
 +
TofT|Lang=ru|Ed=II|N=10|Te=Логистический закон}}{{
 +
TofT|Lang=zh|Ed=II|N=10|Color=yes|Te=罗吉斯蒂法则}}|
 +
Lang=en|Lang2=ar|Lang3=cs|Lang4=de|Lang5=es|Lang6=fr|Lang7=it|Lang8=ja|Lang9=pt|Lang10=ru|Lang11=zh}}
  
 
{{Gallery
 
{{Gallery
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| height=20
 
| height=20
 
| lines=3
 
| lines=3
|703_1_1_en_I Intrinsic rate of natural increase.ogg|'''intrinsic rate of natural increase'''  
+
|703_1_1_en_II Intrinsic rate of natural increase.ogg|'''intrinsic rate of natural increase'''  
|703_1_2_en_I True rate of natural increase.ogg|'''true rate of natural increase'''
+
|703_2_1_en_II Stable population.ogg|'''stable population'''  
|703_2_1_en_I Stable population.ogg|'''stable population'''  
+
|703_3_1_en_II Stable age distribution.ogg|'''stable age distribution'''  
|703_3_1_en_I Stable age distribution.ogg|'''stable age distribution'''  
+
|703_4_1_en_II Initial age distribution.ogg|'''initial age distribution'''  
|703_4_1_en_I Initial age distribution.ogg|'''initial age distribution'''  
+
|703_5_1_en_II Growth potential.ogg|'''growth potential'''  
|703_5_1_en_I Growth, potential.ogg|'''growth, potential'''  
+
|703_6_1_en_II Stationary population.ogg|'''stationary population'''  
|703_6_1_en_I Stationary population.ogg|'''stationary population'''  
+
|703_7_1_en_II Quasi-stable population.ogg|'''quasi-stable population'''
|703_7_1_en_I Logistic population.ogg|'''logistic population'''  
+
|703_9_1_en_II Logistic population.ogg|'''logistic population'''
 +
|703_10_1_en_II Logistic law.ogg|'''logistic law'''  
 
}}
 
}}
  
 
<noinclude>
 
<noinclude>
[[en-I:intrinsic rate of natural increase]] [[ar-I:معدل الصميم للزيادة الطبيعية (صميم)]] [[de-I:wesentliche Zuwachsrate]] [[es-I:tasa intrínseca de crecimiento natural]] [[fi-I:vakaa lisääntyneisyysluku]] [[fr-I:taux intrinsèque d’accroissement naturel]] [[it-I:saggio intrinseco d’incremento naturale]] [[pl-I:istotna stopa przyrostu]] [[pt-I:TAXA de crescimento natural intrínseca]] [[ru-I:Истинный коэффициент естественного прироста]]  
+
[[en-II:intrinsic rate of natural increase]] [[ar-II:معدل الصميم للزيادة الطبيعية]] [[cs-II:vnitřní míra přirozeného přírůstku]] [[de-II:stabile Wachstumsrate]] [[es-II:tasa intrínseca de crecimiento natural]] [[fr-II:taux intrinsèque d’accroissement naturel]] [[it-II:tasso intrinseco di incremento naturale]] [[ja-II:安定人口増加率(または真性自然増加率)]] [[pt-II:taxa intrínseca de crescimento natural]] [[ru-II:Истинный коэффициент естественного прироста]] [[zh-II:内在自然增长率]]  
 
</noinclude>
 
</noinclude>
 
<noinclude>
 
<noinclude>
[[Category:Term of the first edition of the multilingual demographic Dictionary]]
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Revision as of 09:35, 9 January 2010

Intrinsic rate of natural increase  (INTRINSIC rate of natural increase)


It can be shown that when a closed population (701-4) is subjected to constant age-specific fertility and mortality rates (631-8; 412-1) for a sufficiently long period of time, its annual rate of increase will tend to become constant. This constant rate of increase is called the intrinsic rate of natural increase 1, and a population which has reached this stage is called a stable population 2. The proportion of persons in different age groups in such a population will be constant, i.e., the population will have a stable age distribution 3. This stable age distribution is independent of the initial age distribution 4 and depends only on the fertility and mortality rates that are kept constant. Human populations never reach exact stability in practice, as fertility and mortality rates constantly change, but the computation of a stable population as a model and of its intrinsic rates may provide an index of the growth potential 5 of a set of age-specific fertility rates applied to a non stabilized age structure. Related to the growth potential, the moment of inertia of a population or demographic momentum 11★ should be mentioned: it refers to the dynamics hidden in the age structure due to a delayed growth response caused by the biological fact that from the time of birth of a cohort (116-2) to the beginning of their period of fertility (620-1) a certain amount of time passes. A population may for this reason still grow, even though the birth rate drops long ago. The reverse case is also possible. The momentum is particularly altered in case of discontinuity in the evolution of births and abrupt reversals of trends. A stable population in which the intrinsic rate of natural increase is zero is called a stationary population 6. In such a population the numbers in a given age group are equal to the integral of the survivorship function (431-3) of the life table taken between the upper and lower age limits of the group, multiplied by a factor of proportionality common to all age groups. A quasi-stable population 7 is a formerly stable population with constant fertility and gradually changing mortality; characteristics of this type of population are similar to those of a semi-stable population 8★ which is a closed population with a constant age structure. A logistic population 9 is a population growing in accordance with the logistic law 10 of growth, i.e., a population in which the growth rate decreases as a linear function of the population already alive and which will tend asymptotically to an upper limit.

  • 1. The intrinsic rate, also called by its inventor Lotka, the true rate of natural increase, is equal to the difference between the intrinsic birth rate (or stable birth rate) and the intrinsic death rate (or stable death rate).
  • 2. Stable, adj. - stability, n. - stabilize, v.
    Stable population analysis uses the properties of stable population models to estimate various characteristics of real populations.
  • 6. Stationary, adj. - stationarity, n.

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