lt.indices {mortAAR}

Generates indices from a mortAAR life table for use in other functions

Description

This function bundles a number of indices and vectors from a mortAAR life table which are needed by other functions in mortAAR. The results are only meaningful if 5-year-categories have been chosen to construct the life table.

Usage

lt.indices(life_table)

Arguments

life_table

an object of class mortaar_life_table.

Value

A list with the following indices and vectors:

• child_i: ratio of individuals aged 5–9 to those aged 10–14 according to Masset and Bocquet 1977.

• juvenile_i: ratio of individuals aged 5–14 to adults according to Masset and Bocquet 1977.

• P(5-19): ratio of individuals aged 5–19 to those aged 5 or above according to Bocquet-Appel 2002.

• D30_D5): ratio of individuals aged 30 and above to those aged 5 or above according to Buikstra et al. 1986.

• D0_14_D: proportion of individuals aged 0–14 according to McFadden & Oxenham 2018a if infants are represented well.

• e0: life expectancy at age 0.

References

Bocquet-Appel J (2002). “Paleoanthropological Traces of a Neolithic Demographic Transition.” Current Anthropology, 43(4), 637–650.

Masset C, Bocquet J (1977). “Estimateurs en paléodémographie.” L’Homme, 17(4), 65–90.

Buikstra JE, Konigsberg LW, Bullington J (1986). “Fertility and the Development of Agriculture in the Prehistoric Midwest.” American Antiquity, 51(3), 528–546.

McFadden C, Oxenham MF (2018). “The D0-14/D ratio: A new paleodemographic index and equation for estimating total fertility rates.” American Journal of Physical Anthropology, 165(3), 471–479.

Examples

schleswig <- life.table(schleswig_ma[c("a", "Dx")])
lt.indices(schleswig)