Construct · 1 fields · 1 citations

stable population: a standalone construct

One name. One construct. A landmark on the map.

● anchor · the reference state of formal demography Nearest construct by meaning·not indexed
stablepopulation1 CONSTRUCTStable populationSHARPE & LOTKA · 1911

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Mathematical demography

Constant rates yield a fixed age structure

A stable population is the central idealisation of mathematical demography: a closed population subject to unchanging age-specific fertility and mortality rates will, whatever its starting age structure, converge over time to a fixed ("stable") age distribution growing at a constant rate. Sharpe and Lotka's 1911 A problem in age-distribution proved this convergence and characterised the intrinsic rate of natural increase that accompanies it. The construct underlies population projection, the estimation of demographic rates where data are incomplete, and the very idea of an intrinsic growth rate; it is the reference state against which real, changing populations are compared.[1]

Unit
The stable age distribution and intrinsic growth rate implied by a fixed schedule of vital rates
Recovery means
Not applicable
Measured by
Obtained by solving the Lotka renewal equation for the intrinsic growth rate and its associated stable age distribution

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Nearby constructs

sex ratio3 fields · 3 citationsinvariant · one construct, three systemsdoubling time3 fields · 3 citationsinvariant · one construct, three systemsclosed3 fields · 3 citationsjingle · one word, three constructs

References

  1. Sharpe, F. R., & Lotka, A. J. (1911). A problem in age-distribution. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 21(124), 435–438. https://doi.org/10.1080/14786440408637050

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