Long-term consequences of childbearing postponement for the population size are considered. General relations are obtained, which imply that the cohort NRR, the final generation length, and dynamics of the number of genealogical lines determine the final population trend. The period fertility...

The classical result by R.A. Fisher concerning reproductive value dynamics is expanded to the case of varying vital rates with a constant cohort Lotka's r. Based on the demographic potential approach, generalization of the concept of reproductive value is introduced, which exhibits exponential...

The paper introduces a general approach to distributing households by size, which is based on recurrent procedure of estimating conditional proportions of households of a given size among households with the same or larger size. Based on formal study and on empirical evidence, models and methods...

The relation between the hazard rate and its derivative at modal age at death, an equivalent to which has been featured by Pollard (1991), Canudas-Romo (2008), Thatcher et al. (2010), and Tuljapurkar and Edwards (2011), is presented as a handy tool in studying mortality compression in its period...

After a comparative study of the Lee-Carter forecasting method and looking into the direct extrapolation of mortality by age and sex, this paper advocates the use of the latter method. The method is, however, supplemented by additional procedures in order to improve its efficiency in the short...

After a comparative study of the Lee-Carter forecasting method and looking into the direct extrapolation of mortality by age and sex, this paper advocates the use of the latter method. The method is, however, supplemented by additional procedures in order to improve its efficiency in the short...

The paper introduces a general approach to distributing households by size, which is based on recurrent procedure of estimating conditional proportions of households of a given size among households with the same or larger size. Based on formal study and on empirical evidence, models and methods...