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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...

It has been argued recently that a society’s ‘gender system’ influences parents’ sex preferences for children. If this was true, one should expect to find no evidence of such preferences in countries with a high level of gender equality. In this paper we exploit population register data...

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This paper investigates the role of men’s and women’s labor-market attachment in the process of family building in Sweden, taking the perspective of couples. Using register data for the years 1981 to 1999 we estimate event-history models for second and third births. It is shown that income...

This paper analyzes the relationship between children’s day care and fertility in Germany. First, different modes of childcare are discussed with regard to their availability and costs. We then estimate the impact of having access to public day care and care in social networks on first birth...

In diesem Beitrag wird der Zusammenhang zwischen Merkmalen des räumlichen Kontexts und dem Übergang zur ersten Ehe bei westdeutschen Männern in den 1980er und 1990er Jahren untersucht. Hierzu werden im empirischen Teil unter Verwendung von Individualdaten des Sozio-oekonomischen Panels (SOEP)...

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...