The transformation of traditional childbearing patterns of early family formation to later family formation characterized recent fertility trends in Russia. These were intrinsically interwoven with fundamental changes in all aspects of life of young people in the 1990s and the 2000s. The past...

Humans, and many other species, suffer senescence: mortality increases and fertility declines with adult age. Some species, however, enjoy sustenance: mortality and fertility remain constant. Here we develop simple but general evolutionary-demographic models to explain the conditions that favor...

The evolution of different life history strategies and thus different ageing patterns essentially depends on the nature of the underlying trade-offs between survival and reproduction. To fully comprehend ageing, we need to understand these trade-offs.

Combining cohort and period perspectives a method is developed that follows the process of childbearing postponement and recuperation and its reflection in total period fertility levels and trends in low fertility populations. It is complementary to methods pioneered by Bongaarts and Feeney...

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Hamilton quantified the force of selection on an age-specific mutation. Hamilton’s indicators of the age-specific force of selection always decline with age. This result is of profound importance to the theory of the evolution of senescence. Here I derive alternative indicators within...

Major changes in the age patterns of fertility were characteristic of fertility trends following the Second World War. The paper provides an overview and analysis of changes in age patterns of cohort childbearing in low-fertility countries during the second half of the 20 th century. In Western...

This paper is the latest in a series initiated in 1999 which investigates childbearing in low fertility countries from a cohort perspective. Principal conclusions: Major changes in childbearing patterns are continuously taking place in almost all countries. Large families with four and more...

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