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Anastasia Kostaki, Javier M. Moguerza, Alberto Olivares and Stelios Psarakis

metric models. This performance is probably due to the higher smoothness capacity of parametric
models. A higher degree of smoothness may lead to larger distances between the graduated and the
empirical values and, in many cases; it provides oversimplifications of the described patterns or sys-
tematic deviations between the empirical and the graduated values. Concerning the comparison be-
tween SVMs and kernels (the two nonparametric techniques), SVMs provided results, usually with
lower values of the minimizing criteria.

Figure 17. Observed and estimated age-specific nuptiality rates, the Figure 18. Observed and estimated age-specific nuptiality rates,
Netherlands, males, 2003. Norway, females, 1996.

Figure 19. Observed and estimated age-specific nuptiality rates, the UK, Figure 20. Observed and estimated age-specific nuptiality rates,
males, 1999 Sweden, females, 1997.

International Journal of Population Studies | 2016, Volume 2, Issue 1 17