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Table 4 Age-specific fertility values (f j ) for three mean ages of fertility (μ)

From: The time to decline: tracing a cohort’s descendants in below replacement populations

Age Mean age of fertility (μ)
25 29 33
15–19 0.360 0.200 0.060
20–24 0.430 0.310 0.180
25–29 0.110 0.210 0.250
30–34 0.070 0.120 0.240
35–39 0.015 0.100 0.160
40–44 0.010 0.050 0.100
45–49 0.005 0.010 0.010
All ages 1.000 1.000 1.000
  1. Note: The mean ages are calculated based on age at the end of each age interval, per Eq. (3). That mean age is also the mean implied by the dominant left eigenvector of matrix F in Eq. (6)