Australian fertility data

Description

Age-specific fertility rates between ages 15 and 49 in Australia from 1921 to 2006.

The age-specific fertility rates can be smoothed using a weighted median smoothing B-splines, constrained to be concave.

Usage

data(Australiafertility)
data(Australiasmoothfertility)

Format

An object of class fts.

Details

Australian fertility rates and populations (1921-2006) for age groups (15-49) were obtained from the Australian Bureau of Statistics (Cat.No.3105.0.65.001, Table 38). These are defined as the number of live births during the calendar year, according to the age of the mother, per 1000 of the female resident population of the same age at 30 June.

Australiasmoothfertility is the smoothed version of Australiafertility data. The smoothing technique is the penalized regression spline with concave constraint, described in Hyndman and Ullah (2007).

Author(s)

Han Lin Shang

Source

The Australian Demographic Data Bank (courtesy of Len Smith).

References

R. J. Hyndman and M. S. Ullah (2007) "Robust forecasting of mortality and fertility rates: A functional data approach", Computational Statistics and Data Analysis, 51(10), 4942-4956.

R. J. Hyndman and H. Booth (2008) "Stochastic population forecasts using functional data models for mortality, fertility and migration", International Journal of Forecasting, 24(3), 323-342.

R. J. Hyndman and H. L. Shang (2009) "Forecasting functional time series (with discussion)", Journal of the Korean Statistical Society, 38(3), 199-221.

Examples

plot(Australiafertility)
plot(Australiasmoothfertility)

Results