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The conception of the cost of reproduction provides an important insight on connection between fertility and life span in living organisms. Despite substantial progress in understanding this connection many important features of fertility-longevity trade-off are masked by confounding factors,...

In the paper basic epidemiological indicators, produced by an aging population of vectors, are calculated. In the study we follow two lines: calculations for demographically structured population and individual life-history approach. We discuss the advantages and limitations of these approaches...

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At the beginning of the transition period, many Russian households faced substantial economic hardships and uncertainties. An economic downturn had become one of the major factors respon-sible for the significant and rapid decline of Russian fertility. However, many households tried to cope with...

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The paper provides an analysis of divorce risk in first marital unions in Russia, with a major focus on the impact of premarital conception on the stability of subsequent marriage. A number of other predictors are also discussed, including age at first marriage, parity and age of the youngest...

In this paper, a recently developed mathematical model of age related changes in population of peripheral T cells (Romanyukha, Yashin, 2003) is used to describe ontogenetic changes of the immune system. The treatise is based on the assumption of linear dependence of antigen load from basal...

Using data from the first round of the national Gender and Generations Surveys of Russia, Romania, and Bulgaria, and from a similar survey for Hungary, we study rates of entry into marital and non-marital unions and display manifestations of the Second Demographic Transition in these data. The...

Period fertility rates fell to previously unseen low levels in a large number of countries beginning in the early 1990s. The persistence of Total Fertility Rates under 1.3 raised the possibility of dramatic, rapid population aging as well as population decline. In an analysis of recent trends,...