Physical fitness at young adult ages is an important determinant of physical health, cognitive ability, and mortality. However, few studies have addressed the relationship between early life conditions and physical fitness in adulthood. An important potential factor influencing physical fitness...

In this article, we show how stochastic diffusion models can be used to forecast demographic cohort processes using the Hernes, Gompertz, and logistic models. Such models have been used deterministically in the past, but both behavioral theory and forecast utility are improved by introducing...

Cross-sectional analyses of adult lifespan variation have found an inverse association between socioeconomic position and lifespan variation, but the trends by social class are unknown. We investigated trends in lifespan variation over four decades (1971–2010) by occupational social class...

Advanced maternal age is associated with negative offspring health outcomes. This interpretation often relies on physiological processes related to aging, such as decreasing oocyte quality. We use a large, population-based sample of American adults to analyze how selection and lifespan overlap...

Family policies aim to influence fertility and labor force participation, and support families. However, often only fertility and labor supply are considered in policy evaluations. For example, the 2007 extension of parental leave benefits in Germany is generally considered unsuccessful because...

Background: Epigenetic inheritance is a potentially important determinant of health in several mammals. For humans, the existing evidence is weak. We investigate whether disease exposure triggers functional epigenetic inheritance among humans by analyzing siblings who were conceived under...