Description Usage Arguments Value Author(s) References Examples

This function calculates Keyfitz's entropy from a matrix population model, by first using age-from-stage decomposition methods to estimate age-specific survivorship (lx).

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`matU` |
The survival component of a matrix population model (i.e. a square projection matrix reflecting survival-related transitions; e.g. progression, stasis, and retrogression) |

`startLife` |
The index of the first stage at which the author considers the beginning of life. Defaults to 1. |

`nSteps` |
The age-cutoff for the decomposition of age-specific survival
(lx). This allows the user to exclude ages after which mortality or
fertility has plateaued (see function |

`trapeze` |
A logical argument indicating whether the composite trapezoid approximation should be used for approximating the definite integral. |

Returns an estimate of Keyfitz's life table entropy.

Owen R. Jones <[email protected]>

Roberto Salguero-Gomez <[email protected]>

Keyfitz, N. (1977) Applied Mathematical Demography. New York: Wiley.

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