PAPP103 - S07: Demographic models: stable population models

Effects of mortality and fertility patterns on growth and age structure in stable populations (cont.)

Parameter names used in figures:

TFR = total fertility rate, a measure of fertility level, denoted T in PAPP103 – s03
loc = fertility location, denoted theta θ in PAPP103 – s03
spr = fertility spread, denoted phi φ in PAPP103 – s03

Answer the questions about each parameter whose action is illustrated in the diagram.

The age-specific fertility rates represented by the green line are

three	four	six

times higher than the age-specific fertility rates represented by the pink line.

Negative values of the fertility location parameter make the age pattern of fertility

younger	older	lower

than in the standard pattern corresponding to a zero value of the location parameter.

Larger values of the fertility spread parameter make the age pattern of fertility

higher	younger	narrower

than in the standard pattern corresponding to a value of one of the spread parameter.